English
Q1) Write all three Forms of Verbs and learn them ( Any Twenty).
Q2) Write a paragraph on the topic ‘What did I do during Lockdown Period at home?” (120-140 words).
Q3) Write these words in your copy with their meaning and learn them.
Quarantine, Abandon, Abundant, Access, Accommodate, Accumulate, Adapt, Adhere, Agony, Campaign, Prominent, Reluctant, Remorse, Stationary, Diligent.
Q4) You are Rohit or Riya living in Gandhi Vihar Colony, Kashipur Uttarakhand. Write a letter to your your friend telling him or her about your study, whether you like it or not and how you are missing your school as they are closed due to Corona Virus.
Q5) Homophones are the words are the words having same Pronunciation but different in Meaning and Spelling. Write 20 Homophones as given below:
Example:
Air..................Heir
Bare..............Bear
Brake.................Break
Eye......................I
Q6) Homonyms are the words having same pronunciation and spelling but different meaning.
Write 15 Homonyms as given below:
Examples:
Bat - an implement used to hit a ball / a nocturnal flying mammal
Letter, Arm, Rose, Drop, Bark
Q7) Develop and good habit of reading aloud. You can read your lessons of your books especially ‘A pact with the Sun’. Learn all the Question and Answers we have done.
NOTE: WORK SHOULD BE DONE AND MAINTAINED PROPERLY. THIS WORK IS TO BE DONE IN YOUR CLASS WORK COPY. TAKE GOOD CARE OF YOUR COPIES, BOOKS AND YOUR HEALTH.
Q8) See the following Pictures and make a story based on what you see in the pictures.
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HOLIDAY HOME WORK MATH
Q1. Find the greatest and smallest number in each row.
(a) 493, 5983,29,60895,860 Greatest 60895 Smallest 28
(b) 5547,5803,5381,5562 Greatest________ Smallest_________
(c) 16734,16083,16290,16900 Greatest________ Smallest_________
(d) 35396,35345,25370,35320 Greatest________ Smallest_________
Q2. Arrange the following numbers in ascending order
(a) 957,9584,9320,681 (b) 10801,35861,27063,38502
(a) 9000, 8500,85400,9999 (b) 2071,54231,99818,95275
Q4. Use the given digits without repetition and make the greatest and smallest 4-digit numbers.
DIGITS
GREATEST
SMALLEST
SUM
DIFFERENCE
1,7,6,3
7631
1367
8,9,1,5
6,0,4,3
2,8,7,9
0,1,3,5
Q5. Make the smallest and greatest 4-digit number by using any one digit twice
digits
Smallest
Greatest
INDIAN NUMBER SYSTEM
NUMBER
TCr
Cr
TLakh
Lakh
TTh
Th
H
T
0
EXPANSION
72,67,43,645
7
2
6
7
4
3
6
4
5
Seventy two crores sixty seven lakh forty three thousand six hundred forty five
7x10,00,00,000+
2x1,00,00,000+
6x10,00,000+
7x1,00,000+
4x10,000+
Q2. Place commas correctly and write the numerals:
(a) Seven crore fifty five lakh twenty three thousand seven hundred twelve
(b) Fifteen crore
(c) Ninety nine crore eight hundred twenty five
(d) Five crore sixty three lakh twenty six thousand four hundred two
(e) Eighty five crore sixty two thousand and fifteen
Q3. Insert commas correctly and write their names as per Indian number system
(a) 98655124
(b) 179374651
(c) 750000000
(d) 100000000
INTERNATIONAL NUMBER SYSTEM
(i) 520027864 (ii) 295430002 (iii) 1895000049 (iv) 700250009
(a) Write these numbers using placement boxes and then using commas in Indian as well as International System of Numeration..
(b) Arrange these in ascending and descending order.
Q2. Place commas and write the numerals.
(a) Fifty million seven hundred sixty three thousand eight hundred one.
(b) Seventy two million seven hundred thousand seven hundred eighty one
(c) Eleven million
(a) One Million= ______Lakhs
(b) One Crore = _______ Million
(c) One Billion = ____________ Million
HOLIDAY HOME WORK MATH
Large numbers in practice:
Q1. Supriya has to repay a loan of one and a half lakh rupees. She saves Rs.3350 rupees every week for a year (52 weeks). How much money does Supriya have after repaying her loan.
Q2. The hobby store normally sells 10,576 trading cards per month. In June the hobby store sold 15,498 more trading cards than normal . In total, how many trading cards did the hobby Store sell in June?
Q3. One copy of news paper has 14 pages. Everyday 25,225 copies are printed.
How many pages are printed everyday.
Q4. The number of sheets of paper available for making notebooks is 75,000.
Each sheet makes 8 pages of a notebook. Each notebook contains 200pages’
How many notebooks can be made from the paper available.
Q5. A student multiplied 8365 by 75 instead of 8356. By how much was his answer greater than the correct answer.
Q6. A hostel has 8litres of juice. Each glass can hold 25ml. How many glasses can be served.
Q7. A factory manufactured 4,685 helmets a day. How many helmets did it produce in the month of March.
Q8. To stich a shirt 2m 20cm 0f cloth is required. A tailor has purchase 75m of cloth to stich uniform for factory workers.
(a)How many shirts can he stich?
(b) Cost of stich one shirt is Rs. 250. Cost of 1meter cloth is Rs. 150. How much should he charge for each shirt.
HOLIDAY HOME WORK MATH
Estimation
estimation
number
estimation
number
estimation
283
280
1475
1480
1687
1690
52
2835
2946
1324
85
48
2101
215
99
2453
9555
1989
7811
1785
2009
9692
1005
9868
estimation
number
estimation
number
Estimation
741
700
750
800
763
800
749
700
6750
6800
49775
49800
3546
3500
2350
5785
8735
1450
93267
9049
1850
40189
4823
2950
52678
7930
8550
87051
9918
9550
70076
estimation
number
estimation
number
estimation
3413
3000
3500
4000
3877
4000
15499
15000
17500
18000
26,648
27,000
26,301
500
24,856
48,007
79,500
74,599
95,499
24,500
90,600
99,143
99,500
99,757
Roman Numerals
With the help of following box write the Roman Numerals from 1-100
HOLIDAY HOME WORK
CHAPTER 2: Whole Numbers SHEET: 7
Whole Numbers: The natural numbers along with zero form the collection of whole numbers
Q1. Predecessor of :
(a) 2340 is 2340-1= 2339 (b) 13000 is ___________ (c ) 10000 is ________ (d) 234981 is _________(e) 546810 is _____________
Q2. Successor of
(a) 21029 is 21029+1= 21030 (b) 7810 is___________ (c ) 35899 is __________ (d) 99999 Is ________ (e ) 7643201 is ___________
Q3. Write the following
(a) Predecessor of smallest 5 digit number
(b) Successor of largest 5 digit number
(c) The whole number that lies between 499 and 501 (d) The whole number that is not a natural number
(e) Write the next three natural numbers after 11099
(f) How many whole numbers are there between 103 and 121?
(g) Write the three whole numbers occurring just before 20001?
Q4. Find using number line
(a) 4+6 (b) 3+5 (c) 7-5 (d) 8-6 (e) 3x4
Q5. Put appropriate sign <, >, =
Properties Of Whole Numbers
(a) 234+ 197+ 116+ 103 (b) 25x 16865 x4
= 234+116+197+103 = 25x4x16865
= 350+ 300 = 100x16865
(I ) 789x17+789x3
(l) 82452x289- 82452x89
HOLIDAY HOME WORKMATH
CHAPTER 2 : PLAYING WITH NUMBERS SHEET: 9
Q1.Determine the least number which when divided by 3, 4 and 5 leaves remainder 2 in each case.
Q2.A merchant has 120 litres of oil of one kind, 180 litres of another kind and 240 litres of a third kind. He wants to sell the oil by filling the three kinds of oil in tins of equal capacity. What should be the greatest capacity of such a tin?
Q3.Find a 4-digit odd number using each of the digits 1, 2, 4 and 5 only once such that when the first and the last digits are interchanged, it is divisible by 4.
Q4. Using each of the digits 1, 2, 3 and 4 only once, determine the smallest 4-digit number divisible by 4.
Q5. Fatima wants to mail three parcels to three village schools. She finds that the postal charges are Rs 20, Rs 28 and Rs 36, respectively. If she wants to buy stamps only of one denomination, what is the greatest denomination of stamps she must buy to mail the three
parcels?
Q6. Three brands A, B and C of biscuits are available in packets of 12,15 and 21 biscuits respectively. If a shopkeepeer wants to buy an equal number of biscuits, of each brand, what is the minimum number of packets of each brand, he should buy?
Q7. The floor of a room is 8m 96cm long and 6m 72cm broad. Find the minimum number of square tiles of the same size needed to cover the entire floor.
Q8. In a school library, there are 780 books of English and 364 books of Science. Ms. Yakang, the librarian of the school wants to store these books in shelves such that each shelf should have the same number of books of each subject. What should be the minimum number of books in each shelf?
Q9 Using divisiblity tests, determine which of the following numbers are divisible by 4?
(a) 4096 (b) 21084 (c) 31795012
Q10. Test the divisiblity of following numbers by 11
(a) 5335 (b) 9020814
HOLIDAY HOME WORK MATH
CLASS 6 SHEET: 10
Q1. Write the following numerals with appropriate commas
(a) Twenty lakh eighty six thousand four hundred and fifty six.
(b) Three crore four lakh twenty thousand five hundred and sixty one.
(c) Twenty two crore forty lakh nineteen thousand five hundred and sixty one.
(d) Twelve million three hundred seventy one thousand six hundred and nine.
(e) Three hundred twenty two million nine hundred and ninety nine.
Q2. Write the following numerals in words in both the INDIAN and INTERNATIONAL number systems (a) 743891658 (b) 550066888 (c) 398039800 (d) 100000010 (e) 450952318
Q3. Fill in the blanks:-
(a) 1crore=__________ lakh (b) 1million = _____ lakh (c) 10million = ________crore
Q4. The population of a town was 3,47,509 in the year 2005-2006. The next year it was found to have increased by 11,670. What was the population in 2006-2007?
Q5. A Student multiplied 2386 by 78 instead of 87 by mistake. By how much was his answer less than the correct answer.
Q6.Apples are packed in boxes weighing 5kg500g each.These are loaded in a truck with a carrying capacity of 1100kg. How many boxes can be loaded into the truck?
Q7. A vessel contains 5l 500ml of milk. This is to be distributed among children giving each child 125ml. How many children can be given milk.
Q8.To stitch a shirt we need 2m 20cm of cloth. How much cloth will be needed to stitch 50 shirts.
Q9. A local daily prints 10,400 copies of its newspaper. Each copy has 16 pages. How many pages are printed in a day and in a month of 30days.
Q10. One plastic bead weighs 20mg. What will be the weight in grams of a string of these beads containing 120 beads.
Q11. Write the smallest 6-digit number and the smallest 5-digit number. Find their sum.
Q12.Fill in the table:- Number
Round off to tens
Round off to hundreds
Round off to thousands
Q13. Estimate using general rule:
(a) 676+234 (b) 8865-2360 (c) 359x89 (d) 207x111 (e) 4040÷21
Q14. Write the following in ROMAN numerals:
(i)56 (ii) 74 (iii) 93 (iv) 89 (v) 120
Q15. In. a colony of 100 blocks of flats numbering 1 to 100, a school van
stops at every sixth block while a school bus stops at every tenth
block. On which stops will both of them stop if they start from the
entrance of the colony?
(a) 73,279 (b) 3569 (c) 46,007
Q17. Test the divisiblity of following numbers by 11
(a) 5335 (b) 9020814
Q19. Find by suitable rearrangement:-
(i) 229+216+17 (ii)715+250+335 (iii) 829+106+121+244 (iv) 25×272×4 (v) 2×818×50
Q20. Find using suitable property:
(i)717×8+717×2 (ii) 595×96+4×595 (iii)1832+99×1832
53×102 (ii) 112×104 (iii)46×50
Summer vacation 2020
Social Science Class-6
Q.1 Make a project on historical monument in India. Write 4 sentences about each monuments example Red fort, Tazmahal etc.
Q.2 Make a picture of Solar system showing all the planets. Write 3 sentences about each planet.
Q.3 ‘Unity in diversity’ is a unique feature of India. Write an essay on the topic showing diversity exist in different part of the country.
Q.4 Write a note on city ‘Kashipur’ showing all the important features of it.
Q.5 Prepare a political map of India showing all the states union territories and their capital.
Q.6 Prepare a political map of Uttarakhand showing all the district and their headquarters.
Q.7 Learn the question answers of completed chapter from all three books.
Q.8 write a short note on hunters and gatherers.
Q.9 Make a picture of revolution showing equinox and different seasons.
Q.10 make a model of Globe from available material.
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SCIENCE
1. Explain (1-2 sentences) all the key words given at the end of chapter 1,2,3&4.
2. Collect any 5 packed food items and note down the amount of nutrients ( carbohydrates, fats, proteins, vitamins
and minerals) found in them as given on the packet.
3. Paste/draw the pictures of different sources of nutrients in your notebook.
4. Identify the places known for textile industries in our country. Locate them on the map of India.
5. Collect the pieces of various types of fabrics (cotton, silk, jute, nylon, polyester etc.) and paste them in you
notebook. Categorise them into natural and synthetic fabrics.
6. Search (using books, internet etc.) about various deficiency diseases other than those given in your book, and
briefly describe them.
7. Fast food is not good for health. Compose a story with the above message wherein a girl explains to her younger
brother, the bad effects of eating bad food.
SUBJECT: Health and Physical Education
CLASS: VI to VIII
· • Answer the following questions accordingly.
1.Draw the figures of Surya Namaskar with proper mantra of each posture.
2. Why do we need warming up and cooling down before and after the games and sports?
SUBJECT : ENGLISH
CLASS VII
1. Make two beautiful bookmarks for your English notebook. Decorate it and write a quotation of some author or poet.
2. Write a short paragraph on following topics in about 100 words.
· How I spent my summer holidays
· My Pet
LAUGHTER
Physical health benefits Boosts immunity Lowers stress hormones Decreases pain Relaxes your muscles Prevents heart diseases
Mental health benefits Adds joy and zest to life Eases anxiety & tension Relieves stress Improves mood Strengthens resilience
Social benefits Strengthens relationships Attracts others to us Enhances teamwork Helps defuse conflict Promotes group bonding
A. Choose the correct option from the following questions:
i) Laughing boosts ________
c. Social benefit decreases pain
C. Arrange the following words in the correct sequence to form meaningful sentences:
i. relaxes/muscles/laughter/our
ii. zest/adds/to/it/joy/and/life
ii. Laughing strengthens _________________and _____________________.
4. Write and learn antonyms (opposites) of the following words:
Arrival ,Bend ,Borrow ,Freedom ,Intentional ,Transparent ,Obedient ,Deep ,Mature,Hero
5. During this pandemic time you got a chance to spend a lot of quality time with your family.How have you helped your family members? How are you helping in the daily chores? Did you became the helping hand for your loved ones?
Make a slogan on the topic ‘Helping Hand at Home’
6. Revise all the chapters and complete the worksheets done so far.
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MATHS SUMMER HOLIDAY H.W. FOR CLASS -7 (2020-21)
Q1. Learn tables from 1 to 20.
Q2. Maths Activity: a> Draw different shapes on coloured papers,cut them and show the following fractions:-
1/2 , 3/4 , 5/8 , 1/4 and 7/10
Q3. See the videos shared and complete all the work/worksheet given during online classes.
Q4. Do the following worksheet in a separate holiday h.w. copy/any notebook that you have/papers which can be stapled later:
1> 2 subtracted from 7 gives
a> -9 b> 5 c> -5 d> 9
2> Smallest integer is
a> 0 b> -1 c> we cannot write d> -100000
3> Which of the following numbers is to the right of -3 on number line?
a> -4 b> -2 c> -5 d> -6
4> The number of integers between -2 and 2 is-
a> 5 b> 4 c> 3 d> 2
5> Sum of -14 and 9 is
a> 23 b> -23 c> -5 d> 5
6> 2 steps to the right of -1 on the number line gives:
a> 0 b> 1 c> -3 d> 3
7> 3 added to -3 gives
a> 0 b> 2 c>3 d>-5
8> The pair of integers whose sum is -5
a> 1, -4 b> -1, 6 c> -3, -2 d> 5,0
9> Sum of two negative numbers is always-
a> positive b> negative c> 1 d> 0
10> The additive inverse of -8 is
a> 8 b> 18 c> 1/8 d> -1/8
11> Which of the following fractions has numerator 5 ?
a> 2/5 b> 5/7 c> 1 5/7 d> 7 1/5
12> Which one of the following is proper fraction?
a> 8/3 b> 1 3/8 c> 1 8/3 d> 3/8
13>Madhre is standing in the middle of a bridge which is 20m above the water level of a river.If a 35 m deep river is flowing under the bridge (see Fig. 1.1), then the vertical distance between the foot of Madhre and bottom level of the river is:
(a) 55 m (b) 35 m (c) 20 m (d) 15 m
14> If a is an integer other than 1 and –1, match the following:
Column I Column II
(c) (–a) ÷ (–a) (iii) Not an integer
(d) a ÷ (+1) (iv) –a
15> Next three consecutive numbers in the pattern 11, 8, 5, 2, --, --, -- are
(a) 0, – 3, – 6 (b) – 1, – 5, – 8
(c) – 2, – 5, – 8 (d) – 1, – 4, – 7
16> The range of the data 14, 6, 12, 17, 21, 10, 4, 3 is
(a) 21 (b) 17 (c) 18 (d) 11
17> The mode of the data 23, 26, 22, 29, 23, 29, 26, 29, 22, 23 is
(a) 23 and 29 (b) 23 only
(c) 29 only (d) 26 only
18> The probability of getting a number greater than 2 on throwing a die once is _________.
19> The cards bearing letters of the word “MATHEMATICS” are placed in a bag. A card is taken out from the bag without looking into the bag (at random).
(a) How many outcomes are possible when a letter is taken out of the bag at random?
(b) What is the probability of getting
(i) M?
(iv) X?
20> The median of the data 40, 50, 99, 68, 98, 60, 94 is
(a) 40 (b) 60 (c) 68 (d) 99
21>
(a) 0.025 (b) 0.0025 (c) 0.2500 (d) 25000
23>
24>
25> State whether the statement is True or False.
i> The reciprocal of a proper fraction is a proper fraction._________
ii> The reciprocal of an improper fraction is an improper fraction._________
iii> Product of two fractions = Product of their denominators ÷ Product of their numerators_______
iv> The product of two improper fractions is less than both the fractions._________
v> A reciprocal of a fraction is obtained by inverting it upside down____
CLASS:- VII, SOCIAL SCIENCE:- SUMMER HOLIDAY HOMEWORK(2020-21)
HISTORY-:
Q1.Who used the term Hindustan for the first time and when?
Q2. What do you mean by Jati Panchayat?
Q3. What do you mean by pan-regional rule? What was its impact?
Q4. Write a note on Amir Khusrau.
Q5. Who were the parties involved in the “tripartite struggle”?
Q6. What were the qualifications necessary to become a member of a committee of the sabha in the Chola Empire?
Q7. What did the new dynasties do to gain acceptance?
CIVICS-:
Q2.What do you mean by ‘dignity’?
Q3.What is known as the Civil Rights Movements?
Q4.What are the provision made in the constitution for the recognition of equality?
Q5.Point out two different kinds of inequalities that exist in our country with examples .
GEOGRAPHY-:
Q2.How is environment important for us?
Q3. Give a detail account of various domains of the environment.
Q4. Write a short note about the deepest mine in the world.
Q5. Describe the interior of the earth.
MAP ACTIVITY:- Locate and label the following on the political map of India-:
[A] (i) Arabian sea ( ii) Bay of Bengal(iii) Indian Ocean (iv) Himalaya Mt.
[B] Major kingdoms, seventh-twelfth Century-: Gurjara-Pratiharas, Rashtrakutas, Palas, Cholas and Chahamanas (Chauhans).Identify the present-day states over which they exercised control.
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HOLIDAY HOMEWORK FOR CLASS VII SCIENCE
1. Explain( in 1-2 sentences) all the keywords given at the end of chapter 1,2,3&4.
2. Search and write in brief, about the life history of any 3 renowned scientists.
3. What do you mean by occupational hazards? Give any 5 examples.
4. Collect data from your friends, neighbours and classmates to know more about milk teeth. Tabulate your
data as given below:
Find out from at least ten children.
5. Make structure of stomata using kidney bean and explain how stomata helps in photosynthesis and
transpiration.
6. Collect various types of coloured leaves (refer fig 1.4, pg 4) including green leaves and paste them in your
notebook. Try to find out their names.
7. Draw and explain life cycle of silk worm.
S. No Age at which 1st
tooth fell
Replaced.
SUBJECT : ENGLISH
CLASS VIII
1. Movie Review: Watch any one of the following movies and then in your own words you have to write a review. Make a file with beautiful cover page of the movie.You can paste pictures or draw as well.
How to do – Make a file and it should include
1. An attractive cover page
2. Index ( Topic and Page Number)
3. You can write about the plot,characters, any favourite scene.
4. Motivational dialogues from the movie.
5. Message learnt
· Finding Nemo/ Finding Dory
· Home Alone series
2. Write a paragraph in about 100-120 words on the following topics:
· Child Labour
· Importance of sports
3. You are Sameer/Saniya the Literary Captain of your school. Your school has decided to organise a book fair. Draft a notice informing students about the same with all the necessary details.
4. Write a letter to your friend describing a cricket match that you witnessed in the stadium.
5. Collect pictures of various kinds of natural disasters like Tsunami, Earthquake, Volcano, Flood, Hurricane, Landslides etc. and make a collage.
6. Revise all the chapters and complete the worksheets done so far.
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MATHS SUMMER HOLIDAY H.W. FOR CLASS -8 (2020-21)
Q1. Learn tables from 1 to 20.
Q2. See the videos shared and complete all the work/worksheet given during online classes.
Q3. Do the following worksheet in a separate holiday h.w. copy/any notebook that you have/papers which can be stapled later:
1. Multiplicative inverse of 0/1 is
(a) 1 (b) –1 (c) 0 (d) not defined
2. A number which can be expressed as p/q where p and q are integers and q ≠ 0 is
(a) natural number. (b) whole number.
(c) integer. (d) rational number
3.Which of the following is not true?
(a) rational numbers are closed under addition.
(b) rational numbers are closed under subtraction.
(c) rational numbers are closed under multiplication.
(d) rational numbers are closed under division.
3. Zero (0) is
4. One (1) is
5. Multiplicative inverse of a negative rational number is
(a) a positive rational number. (b) a negative rational number.
(c) 0 (d) 1
6.If y be the reciprocal of rational number x, then the reciprocal of y will be
(a) x (b) y (c)x/y (d)y/x
7. Between two given rational numbers, we can find
(a) one and only one rational number.
(b) only two rational numbers.
(c) only ten rational numbers.
(d) infinitely many rational numbers.
8.The numbers ___________ and ___________ are their own reciprocal.
9.
(d) only constant term.
11. Which of the following is a linear expression:
(a) x2 + 1 (b) y + y2 (c) 4 (d) 1 + z
12. The solution of the equation 3x – 4 = 1 – 2 x is _________.
13. The digit in the tens place of a two digit number is 3 more than the
digit in the units place. Let the digit at units place be b. Then the
number is
(a)11b + 30 (b) 10b + 30 (c) 11b + 3 (d) 10b + 3
14. Arpita’s present age is thrice of Shilpa. If Shilpa’s age three years ago
was x. Then Arpita’s present age is
(a) 3(x – 3) (b) 3x + 3 (c)3x – 9 (d) 3(x + 3)
15. The share of A when Rs 25 are divided between A and B so that A gets Rs. 8 more than B is _________.
16. Convert the statement Adding 15 to 4 times x is 39 into an equation _________. 17.
18. If the diagonals of a quadrilateral bisect each other at right angles, it will be a
(a) rhombus (b) trapezium (c) rectangle (d) kite
19. The sum of the angles of a quadrilateral is
(a) 180° (b) 270° (c) 360° (d) 300°
20. Rukmini has a farm land which is triangular in shape.What is the sum of all the exterior angles taken in an order of the farm land?
(a) 90° (b) 180° (c) 360° (d) Can not be determined.
21. How many sides does an octagon have?
(a) 7 (b) 8 (c) 9 (d) 10
22. Every rectangle is a parallelogram. [True/False]
23. Every rhombus is a kite. [True/False]
24. Every parallelogram is a trapezuim. [True/False]
25. Diagonals of a rectangle are perpendicular to each other. [True/False]
26. The four angles of a quadrilateral are in the ratio 3 : 4 : 5 : 6. Find the angles.
27. Each interior angle of a polygon is 108°. Find the number of sides of the polygon.
Class-viii (science holiday homework)
1. Select the correct word from the following list and fill in the blanks.
(float, water, crop, nutrients, preparation)
(a) The same kind of plants grown and cultivated on a large scale at a
Place is called _____________.
(b) The first step before growing crops is _____________ of the soil.
c) Damaged seeds would _____________ on top of water.
(d) For growing a crop, sufficient sunlight and _____________ and
_____________ from the soil are essential.
2.Give two examples of each.
(a) Kharif crop
(b) Rabi crop
3. Explain how fertilisers are different from manure.
4. What is irrigation? Describe two methods of irrigation which conserve water.
5. If wheat is sown in the kharif season, what would happen? Discuss.
6. Explain how soil gets affected by the continuous plantation of crops in
a field.
8. Fill in the blanks.
(a) Microorganisms can be seen with the help of a ____________.
(b) Blue green algae fix __________ directly from air and enhance fertility
of soil.
(d) Cholera is caused by __________.
9. Tick the correct answer.
(a) Yeast is used in the production of-
(i) sugar (ii) alcohol (iii) hydrochloric acid (iv) oxygen
(b) The following is an antibiotic-
(i) Sodium bicarbonate (ii) Streptomycin (iii) Alcohol (iv) Yeast
(c) Carrier of malaria-causing protozoan is-
(i) female Anopheles mosquito (ii) cockroach (iii) housefly (iv) butterfly
10.Categorise the materials of the following products into ‘can be recycled’
and ‘cannot be recycled’.
Telephone instruments, plastic toys, cooker handles, carry bags, ball point
pens, plastic bowls, plastic covering on electrical wires, plastic chairs,
electrical switches.
11. Anjali wants to buy shirts for summer. Should he buy cotton shirts or
shirts made from synthetic material? Advise Anjali, giving your reason.
12. Give examples to show that plastics are noncorrosive in nature.
13. Should the handle and bristles of a tooth brush be made of the same
material? Explain your answer.
14.In the following situations identify the agent exerting the force and the
object on which it acts. State the effect of the force in each case.
(a) Squeezing a piece of lemon between the fingers to extract its juice.
(b) Taking out paste from a toothpaste tube.
(c) A load suspended from a spring while its other end is on a hook fixed
to a wall.
(d) An athlete making a high jump to clear the bar at a certain height.
15. A blacksmith hammers a hot piece of iron while making a tool. How does
the force due to hammering affect the piece of iron?
16. An inflated balloon was pressed against a wall after it has been rubbed
with a piece of synthetic cloth. It was found that the balloon sticks to the
wall. What force might be responsible for the attraction between the balloon
and the wall?
17. Name the forces acting on a plastic bucket containing water held above
ground level in your hand. Discuss why the forces acting on the bucket do
not bring a change in its state of motion.
18.A rocket has been fired upwards to launch a satellite in its orbit. Name
the two forces acting on the rocket immediately after leaving the launching
pad.
19. Give two examples of situations in which applied force causes a change in the shape of an object.
20. Fill in the blanks in the following statements.
(a) To draw water from a well we have to __________ at the rope.
(b) A charged body __________ an uncharged body towards it.
(c) To move a loaded trolley we have to __________ it.
(d) The north pole of a magnet __________the north pole of another Magnet.
SUMMER VACATION
CLASS 8
1. Differentiate between potential and actual resources?
2. Differentiate between ubiquitous and localised resources?
3. Why is resources distributed unequally over the Earth?
4. why are human resources important?
5. what is sustainable development?
6. what is resource conservation?
7. Which are the two main climatic factors responsible for soil formation?
8. Why is land considered an important resource?
9. Suggest three ways to conserve water?
10. Write any three reasons for land degradation today?
11. What are different methods of soil conservation?
12. why is earth called water planet?
13. Growth of vegetation depends upon moisture and temperature explain?
14. How is vegetation and wildlife useful for us?
15. why does a country needs a constitution?
16. explain the federal structure of India?
17. How is India a secular Nation?
18. What is the problem with the periodisation of Indian history that James mill offers?
19. Why did the British preserve official documents?
20. What did James mill think about the Asian societies?
B. MAP WORK
Identify and locate the following on the map of india
Kolkata
Mumbai
Hyderabad
Chennai
Pune
Indore
Ajmer
Mysore
Identify and locate the following on the map of world-
France
China
Nepal
Bhutan
Italy
Canada
England
Russia
Australia
C. Write the names of the 10 Prime Ministers of India.
D. Write the names of the union territories of India
E. Write the names of all the states of India and also write their capitals.
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ENGLISH HOLIDAY HOMEWORK
Q1) Develop your Reading Skill by reading the lessons of Supplementary Book ‘Moments’. It contains some very good chapters. Learn the Question and Answer of the lessons that we have done so far.
Q2) Write a paragraph on the topic ‘What did I do during Lockdown Period at home?” (120-150 words).
Q3) Write the meaning of the given words and learn them.
Accommodation, Acquaintance, Abundant, Confirmation, Ecstasy, Emphatically, Endeavor, Exaggeration, Monotony, Prejudice, Souvenir, Segregation, Ridiculous, Hilarious, Quarantine.
Q4) You are Rohit or Riya living in Gandhi Vihar Colony, Kashipur Uttarakhand. Write a letter to your your friend telling him or her about your study, whether you like it or not and how you are missing your school as they are closed due to Corona Virus.
Q5) You are Rakesh or Riya. You have been shocked to see the deaths caused by Corona Virus and how the virus has affected many countries. Write an Article on the topic: ‘Covid-19, An Epidemic’. (150-200) words.
Q6) Define the following terms (Literary Devices) with Examples (at least 3) of each:
i) Simile ii) Metaphor iii) Hyperbole iv) Personification v) Alliteration vi) Repetition vii) Anaphora
Q7) CROSS WORD
T 1
R 2
L 3
A 4
R 5
G 6
E 7
R 8
O 9
E 10
A 11
Z 12
Z 13
Z 14
U 15
C 16
R 17
P 18
R 19
E 20
A 21
S 22
O 23
N 24
T 25
O 26
A 27
C 28
T 29
R 30
F 31
E 32
U 33
R 34
O 35
A 36
E 37
Z 38
F 39
W 40
R 41
T 42
R 43
M 44
Z 45
S 46
I 47
T 48
E 49
Z 50
O 51
E 52
Z 53
Z 54
C 55
O 56
Z 57
R 58
H 59
T 60
R 61
A 62
E 63
N 64
Words can be framed horizontally, vertically, up side-down, down side-up and across vice-versa.
Don’t leave any letter/s in a series.
a) Name of a country……………
b) Synonym of “Cause”……….
d) Sun is a …………….
f) The inner most layer of the earth………….
g) A red layer on iron……………
h) A style of writing an account………………..
i) Mental or physical oppression of a person………………………
j) Weeping brings………….. into eyes.
k) A place where people work…………….
l) Comparative degree of “Large”…………..
m) Name of a scientist………………
m) Name of a planet……………….
n) Second form of “come”…………
o) Sound of a Lion………………
Q8) PISA based Passage :Literary Skills. (Shared with students in their class groups)
HOLIDAY HOMEWORK CLASS IX
Multiple Choice Questions
1. Which of the following statements are true for pure substances?
(i) Pure substances contain only one kind of particles
(ii) Pure substances may be compounds or mixtures
(iii) Pure substances have the same composition throughout
(iv) Pure substances can be exemplified by all elements other than nickel
(a) (i) and (ii)
(b) (i) and (iii)
(c) (iii) and (iv)
(d) (ii) and (iii)
2. Rusting of an article made up of iron is called
(a) corrosion and it is a physical as well as chemical change
(b) dissolution and it is a physical change
(c) corrosion and it is a chemical change
(d) dissolution and it is a chemical change
3. A mixture of sulphur and carbon disulphide is
(a) heterogeneous and shows Tyndall effect
(b) homogeneous and shows Tyndall effect
(c) heterogeneous and does not show Tyndall effect
(d) homogeneous and does not show Tyndall effect
4. Tincture of iodine has antiseptic properties. This solution is made by
dissolving
(b) iodine in vaseline
(c) iodine in water
(d) iodine in alcohol
(i) ice (ii) wood (iii) soil (iv) air
(a) (i) and (iii)
(b) (ii) and (iv)
(c) (i) and (iv)
(d) (iii) and (iv)
(i) Melting of iron metal
(ii) Rusting of iron
(iv) Drawing a wire of iron metal
(a) (i), (ii) and (iii)
(b) (i), (ii) and (iv)
(c) (i), (iii) and (iv)
(d) (ii), (iii) and (iv)
7. Which of the following are chemical changes?
(i) Decaying of wood
(ii) Burning of wood
(iii) Sawing of wood
(iv) Hammering of a nail into a piece of wood
(a) (i) and (ii)
(b) (ii) and (iii)
(c) (iii) and (iv)
(d) (i) and (iv)
8. Two substances, A and B were made to react to form a third substance,
QB according to the following reaction
2 A + B —+ B
Which of the following statements concerning this reaction are incorrect?
(i) The product QB shows the properties of substances A and B
(ii) The product will always have a fixed composition
(iii) The product so formed cannot be classified as a compound
(iv) The product so formed is an element
(a) (i), (ii) and (iii),
(b) (ii), (iii) and (iv)
(c) (i), (iii) and (iv)
(d) (ii), (iii) and (iv)
9. Two chemical species X and Y combine together to form a product P which contains both X and Y
X+YEP
X and Y cannot be brohen down into simpler substances by simple chemical
reactions. Which of the following concerning the species X, Yand P are correct?
(i) P is a compound
(ii) X and Y are compounds
(iii) X and Y are elements
( L )
(a) (i), (ii) and (iii),
(b) (i), (ii) and (iv)
(c) (ii), (iii) and (iv)
(d) (i), (iii) and (iv)
Short Answer Questions
10. Suggest separation technique(s) one would need to employ to separate the following mixtures.
(a) Mercury and water
(c) Common salt, water and sand
(d) Kerosene oil, water and salt
Which of the tubes in Fig. 2. 1 (a) and (b) will be more effective as a condenser in the distillation apparatus?
12. Salt can be recovered from its solution by evaporation.
Suggest some other technique for the same?
The ‘sea-water’ can be classified as a homogeneous
as well as heterogeneous mixture. Comment.
14. While diluting a solution of salt in water, a student by
mistake added acetone (boiling point 56°C). What technique can be
employed to get back the acetone? Justify your choice.
zs.
What would you observe when
(a) a saturated solution of potassium chloride prepared at 60°C is allowed
to cool to room temperature.
(b) an aqueous sugar solution is heated to dryness.
(c) a mixture of iron filings and sulphur powder is heated strongly.
16. Explain why particles of a colloidal solution do not settle down when left undisturbed, while in the case of a suspension they do.
Smoke and fog both are aerosols. In what way are they different?
18. Classify the following as physical or chemical properties
(a) The composition of a sample of steel is: 98% iron, 1.5% carbon and 0.5% other elements.
(b) Zinc dissolves in hydrochloric acid with the evolution of hydrogen gas.
(c) Metallic sodium is soft enough to be cut with a knife.
(d) Most metal oxides form alkalis on interacting with water.
19. The teacher instructed three students ‘A’, ‘B’ and ‘C’ respectively to prepare a 50% (mass by volume) solution of sodium hydroxide (NaOH). ‘A’ dissolved 50g of NaOH in 100 mL of water, ‘B’ dissolved 5og of NaOH in 1009 of water while ‘C’ dissolved 50g of NaOH in water to make 100 mL of solution. Which one of them has made the desired solution and why?
2O. Name the process associated with the following
(a) Dry ice is kept at room temperature and at one atmospheric pressure.
(b) A drop of ink placed on the surface of water contained in a glass spreads throughout the water.
(c) A potassium permanganate crystal is in a beaker and water is poured into the beaker with stirring.
(d) A acetone bottle is left open and the bottle becomes empty.
(e) Milk is churned to separate cream from it.
(1) Settling of sand when a mixture of sand and water is left undisturbed for some time.
(g) Fine beam of light entering through a small hole in a dark room, illuminates the particles in its paths.
2L You are given two samples of water labelled as ‘A’ and ‘B’. Sample ‘A’ boils at l00°C and sample ‘B’ boils at 102°C. Which sample of water will not freeze at 0°C? Comment.
22. What are the favourable qualities given to gold when it is alloyed with copper or silver for the purpose of making ornaments?
23. An element is sonorous and highly ductile. Under which category would you classify this element? What other characteristics do you expect the element to possess?
24. Give an example each for the mixture having the following characteristics. Suggest a suitable method to separate the components of these mixtures
(a) A volatile and a non-volatile component.
(b) Two volatile components with appreciable difference in boiling points.
(c) Two immiscible liquids.
(d) One of the components changes directly from solid to gaseous state.
(e) Two or more coloured constituents soluble in some solvent.
25. Fill in the blanks
(a) A colloid is a mixture and its components can be separated by the technique known as
(b) Ice, water and water vapour look different and display different properties but they are the same.
(c) A mixture of chloroform and water taken in a separating funnel is mixed and left undisturbed for some time. The upper layer in the separating funnel will be of and the lower layer will be that of
(d) A mixture of two or more miscible liquids, for which the difference in the boiling points is less than 25 K can be separated by the process called
( L )
(e) When light is passed through water containing a few drops of milk, it shows a bluish tinge. This is due to the of light by milk and the phenomenon is called . This indicates that milk is a solution.
26. Sucrose (sugar) crystals obtained from sugarcane and beetroot are mixed together. Will it be a pure substance or a mixture? Give reasons for the same.
2T. Give some examples of Tyndall effect observed in your surroundings?
28. Can we separate alcohol dissolved in water by using a separating funnel? If yes, then describe the procedure.
If not, explain.
29. On heating calcium carbonate gets converted into calcium oxide and carbon
dioxide.
(a) Is this a physical or a chemical change?
(b) Can you prepare one acidic and one basic solution by using the products formed in the above process? If so, write the chemical equation involved.
30. Non metals are usually poor conductors of heat and electricity. They are non-lustrous, non-sonorous, non-malleable and are coloured.
(a) Name a lustrous non-metal.
(b) Name a non-metal which exists as a liquid at room temperature.
(c) The allotropic form of a non-metal is a good conductor of electricity. Name the allotrope.
(d) Name a non-metal which is known to form the largest number of compounds.
(e) Name a non-metal other than carbon which shows allotropy.
(f) Name a non-metal which is required for combustion.
Classify the substances given in Fig. 2.2 into elements and compounds
32. Which of the following are not compounds?
(a) Chlorine gas
(b) Potassium chloride
(h) Carbon monoxide
(i) Sulphur powder
Long Answer Questions
Fractional distillation is suitable for separation of miscible liquids with a boiling point difference of about 25 K or less. What part of fractional distillation apparatus makes it efficient and possess an advantage over a simple distillation process. Explain using a diagram.
34. (a) Under which category of mixtures will you classify alloys and why?
(b) A solution is always a liquid. Comment.
(c) Can a solution be heterogeneous?
( L )
as.
Iron filings and sulphur were mixed together and divided into two parts, ‘A’ and ‘B’. Part ‘A’ was heated strongly while Part ‘B’ was not heated. Dilute hydrochloric acid was added to both the Parts and evolution of gas was seen in both the cases. How will you identify the gases evolved?
36. A child wanted to separate the mixture of dyes constituting a sample of ink. He marked a line by the ink on the filter paper and placed the filter paper in a glass containing water as shown in Fig.2.3. The filter paper was removed when the water moved near the top of the filter paper.
(i) What would you expect to see, if the ink contains three different coloured components?
(ii) Name the technique used by the child.
(iii) Suggest one more application of this technique.
A group of students took an old shoe box and covered it with a black paper from all sides. They Pixed a source of light (a torch) at one end of the box by making a hole in it
Glass rod Paper clips
Strip of filter paper
containing sample
and made another hole on the other side to view the light. They placed a milk sample contained in a beaker/tumbler in the box as shown in the Fig.2.4. They were amazed to see that milk taken in the tumbler was
Source of light
Eye
illuminated. They tried the same activity by taking a salt solution but found that light simply passed through it?
(a) Explain why the milk sample was illuminated. Name the phenomenon involved.
(b) Same results were not observed with a salt solution. Explain.
(c) Can you suggest two more solutions which would show the same effect as shown by the milk solution?
38. Classify each of the following, as a physical or a chemical change. Give
reasons.
(c) Burning of kerosene in a lantern.
(d) Change in the colour of black tea on adding lemon juice to it.
(e) Churning of milk cream to get butter.
39. During an experiment the students were asked to prepare a 10% (Mass/Mass) solution of sugar in water. Ramesh dissolved log of sugar in 1009 of water while Sarika prepared it by dissolving 109 of sugar in water to make 1009 of the solution.
(a) Are the two solutions of the same concentration
(b) Compare the mass % of the two solutions.
40. You are provided with a mixture containing sand, iron filings, ammonium chloride and sodium chloride. Describe the procedures you would use to separate these constituents from the mixture?
41. Arun has prepared 0.01% (by mass) solution of sodium chloride in water. Which of the following correctly represents the composition of the solutions?
(a) 1.00 g of NaC1 + 1009 of water
(b) 0. llg of NaC1 + 100g of water
(c) 0.01 g of NaC1 + 99.99g of water
(d) 0. 10 g of NaCl + 99.90g of water
42. Calculate the mass of sodium sulphate required to prepare its 20% (mass percent) solution in 100g of water?
Class-IX Holiday Homework Science-Physics
1. An athlete completes one round of a circular track of diameter 400 m in 80 s. What will be the distance covered and the displacement at the end of 4 minutes 40 s?
2. Joseph jogs from one end A to the other end B of a straight 500 m road in 4 minutes 50 seconds and then turns around and jogs 300 m back to point C in another 3 minute. What are Joseph’s average speeds and velocities in jogging (a) from A to B and (b) from A to C?
3. Abdul, while driving to school, computes the average speed for his trip to be 30 km/h. On his return trip along the same route, there is less traffic and the average speed is 40 km /h. What is the average speed for Abdul’s trip?
4. A motorboat starting from rest on a lake accelerates in a straight line at a constant rate of 3.0 m/s2 for 8.0 s. How far does the boat travel during this time?
5. A driver of a car travelling at 52 km /h applies the brakes and accelerates uniformly in the opposite direction. The car stops in 5 s. Another driver going at 3 km/h in another car applies his brakes slowly and stops in 10 s. On the same graph paper, plot the speed versus time graphs for the two cars. Which of the two cars travelled farther after the brakes were applied?
6.A ball is gently dropped from a height of 20 m. If its velocity increases uniformly at the rate of 10 m /s2, with what velocity will it strike the ground? After what time will it strike the ground?
7. State which of the following situations are possible and give an example for each of these: (a) an object with a constant acceleration but with zero velocity (b) an object moving in a certain direction with an acceleration in the perpendicular direction.
8. An artificial satellite is moving in a circular orbit of radius 82250 km. Calculate its speed if it takes 24 hours to revolve around the earth.
9.The brakes applied to a car produce an acceleration of 6 m/s2 in the opposite direction to the motion. If the car takes 2s to stop after the application of brakes, calculate the distance it travels during this time.
10.A train starting from rest attains a velocity of 72 km h–1 in 5 minutes. Assuming that the acceleration is uniform, find (i) the acceleration and (ii) the distance travelled by the train for attaining this velocity
–
– 2020-21
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CLASS –IX
SUBJECT - MATHS
√2, √3, √5, √7
3.63, 0.6, 483.57, 38.23
3. Solve any Ten question relating to rationalize the denominator.
4. Write all algebraic identities involved in chapter 2 (Polynomial) and also learn them seriously.
5. Solve five questions relating to each identity.
6. Practice seriously & attentively all worksheet shared.
SUMMER VACATION
CLASS 9
A. ASSIGNMENT
Short answer type questions
1.what is multiple cropping?
2. Describe two non farm activities in the village Palampur?
2
3. Discuss about farm labourers in the village Palampur?
?
4. Name the countries which are larger than India by size?
?
5. what is the importance of standard Meridian line of India?
?
6. What are tectonic plates?
?
7. distinguish between Bhangar and Khadar?
?
8. Distinguish between Western Ghats and Eastern Ghats?
?
9. Describe the brief description of Himalayas?

10. explain any three features of Deccan Plateau
?
11. explain any three features of Northern Plains?
?
12. Name any three main social classes of 18th century France?
18 ?
13. How many taxes applicable on the third estate?
?
14. what led to the fall of the Bastille?
?
15. explain the island groups of India?
?
LONG ANSWER TYPE QUESTIONS
1.What were the main causes of the French revolution of 1789?
1789 ?
2. Describe the event of 14 July 1789?
14 1789 ?
3. What is the longitudinal and latitudinal extension of India what is its importance?
?
4. Explain how the Himalayas act as a boon for India?
?
5. describe the Indian desert?
?
6. describe the coastal plains?
?
7. Which is the oldest landmass in India write any five features?
?
8. Describe any three divisions of the Himalaya on the basis of regions from west to east?
?
9. The Indian ocean named after our country India explain?
?
10. What is the role of philosophers in the French Revolution?
?
11. Which causes led to subsistence crisis in France during the old regime?
?
12. describe the dairy activity in the village Palampur?
?
13. How small and large farmers arrange capital for farming activity?
?
14. what is physical capital? what are its different types?
- ?
15. Describe non farming activities in Palampur?
- ?
B. MAP WORK
1. Tropic of Cancer
2. Standard Meridian of India
3. The Aravali mountain range
4. The vindhyachal mountain range
5. The satpura mountain
6. Western Ghat and Eastern Ghat
7. Mount Everest
8. Islands of India
9. Anaimudi
10. Nilagiri
C.Make 10 multiple choice questions from each chapter
A. The French revolution
B. India size and location
C. Physical features of India
CLASS- 10TH
SUBJECT- ENGLISH
(READING)
1. READING OF FOLLOWING LESSONS AND SOLVING COMPREHENSION EXERCISES GIVEN ALONG WITH THE TEXT:
A. A Letter to God (first flight)
B. Nelson Mandela- long walk to freedom (first flight)
C. Two Stories of Flying (first flight)
D. Dust of Snow & Fire and Ice (first flight)
E. A Tiger in the Zoo (first flight)
F. A Triumph of Surgery ( FOOTPRINTS WITHOUT FEET)
G. The Thief’s Story ( FOOTPRINTS WITHOUT FEET)
NOTE :- All this work must be completed in a Ax4 size fair notebook.
(WRITING)
2. WRITE ALL THESE QUESTIONS IN PROPER FORMAT AND WORD LIMIT(120 TO 150 WORDS):
1. You are Tanvi/Shirish of Safdarjung Development Area, New Delhi. You are extremely disturbed about the attacks on old people living alone. Write a letter to the Editor, The New Indian News making people sensitive to the problem. Make suggestions to the people living alone and the authorities to ensure that such attacks do not take place.
2. You are Ajeet / Anika, a student of S.M. Public School, Delhi . You are concerned about the water crisis which has become very dangerous .Write a letter to the editor of a newspaper highlighting the need to provide water in drought hit areas and the dire need of creating awareness about the conservation of water through informative posters.
3. Write a letter to the editor of a national daily, highlighting the problem of dirty and unhygienic public places and suggesting practical ways to ensure public sanitation to save people from diseases.
NOTE :- 1. All this work must be completed in an Ax4 size fair notebook.
3. For grammar lessons and exercises please visit youtube channel-htts://www.youtube.com/channel/UCILNx9AvR1KbE6_tuyRPMYg
Or www.yschandel.blogspot.com
1
3
What is refraction of light? Define regular and irregular reflection.
4
5
6
Why can’t we see our image in book just as we see in mirrors though both reflect light?
7
Give any two uses of (i) convex (ii) concave mirrors
8
9
If the speed of light in water is 2.25 x 108 m/s and in glass is 2 x 108 m/s. find refractive index of (i) glass w.r.t water (ii) Water w.r.t glass
10
Draw a ray diagram to show the refraction of light through a glass slab. If incident ray is at 450 what will be the angle of emergence.
11
Draw the ray diagrams showing image formation by a concave mirror when the object is at
(i) focus (ii) between pole and focus
(iii) between center of curvature and infinity
12
State mirror formula. Use it to prove that a convex mirror always forms virtual image.
13
An object of size 2cm is kept at a distance of 50cm from a mirror. Its real image of 2cm is formed. Find the focal length of the mirror and the type of mirror. Draw a suitable ray diagram for the given problem.
14
What is the ratio of focal length and radius of curvature of a mirror? What is the focal length of a plane mirror?
15
A concave lens has a focal length of 40cm. an object of size 5cm is place in front of it. Its image of 4cm is formed. Find the object distance and image distance.
16
What is lens formula? Define magnification and write the formula for magnification produced by a lens in terms of object distance and image distance.
17
Draw the ray diagram to show the image formation by a convex lens in the following cases:
(i) object is at 2F (ii) object between 2F and F
(iii) object between infinity and 2F (iv) object at F
18
Draw a ray diagram to show the image formation by a concave lens when (i) the rays of light are so incident that they would be meeting at the focus of it (ii) the object is at its focus
19
Define power of a lens. What is its SI unit?
20
Determine the focal length of a lens which has a power of 0.75D
21
22
A lens has a focal length 40cm, other is of 0.25D and third one has a focal length f. if all the three are kept in contact the focal power of resulting system is -0.2D. determine the value of ‘f’
23
A ray of light is incident at angle of 450 in a medium. It is refracted at 600 into the other medium. Find the refractive of 2nd medium w r t other. Which of the two medium is a denser medium?
Given that sin450 = 0.707 and sin600 = 0.866
24
What will be the power of a plane glass plate?
25
A convex lens has a focal length of 20cm. an object is placed 50cm from it. Find the position nature and size of image if object is 4cm long. Draw the relevant ray diagram.
All solved questions and Exercise of NCERT chapter-10 : LIGHT
Multiple Choice Questions
1. Which of the following is not a physical change?
(a) Boiling of water to give water vapour
(b) Melting of ice to give water
(c) Dissolution of salt in water
(d) Combustion of Liquefied Petroleum Gas (LPG)
2. The following reaction is an example of a
4NH3(g) + 5O2(g) 4NO(g) + 6H2O(g)
(a) (i) and (iv) (b) (ii) and (iii)
(c) (i) and (iii) (d) (iii) and (iv)
3. Which of the following statements about the given reaction are correct?
3Fe(s) + 4H2O(g) Fe3O4(s) + 4H2(g)
(ii) Water is getting reduced
(iii) Water is acting as reducing agent
(iv) Water is acting as oxidising agent
(a) (i), (ii) and (iii) (b) (iii) and (iv)
(c) (i), (ii) and (iv) (d) (ii) and (iv)
4. Which of the following are exothermic processes?
(i) Reaction of water with quick lime
(ii) Dilution of an acid
(iii) Evaporation of water
(a) (i) and (ii) (b) (ii) and (iii)
(c) (i) and (iv) (d) (iii) and (iv)
Chemical Reactions
and Equations
2 EXEMPLAR PROBLEMS – SCIENCE
5. Three beakers labelled as A, B and C each containing 25 mL
of water were taken. A small amount of NaOH, anhydrous
CuSO4 and NaCl were added to the beakers A, B and C
respectively. It was observed that there was an increase in
the temperature of the solutions contained in beakers A and
B, whereas in case of beaker C, the temperature of the
solution falls. Which one of the following statement(s) is(are)
correct?
(i) In beakers A and B, exothermic process has occurred.
(ii) In beakers A and B, endothermic process has occurred.
(iii) In beaker C exothermic process has occurred.
(iv) In beaker C endothermic process has occurred.
(a) (i) only (b) (ii) only
(c) (i) and (iv) (d) (ii) and (iii)
6. A dilute ferrous sulphate solution was gradually added to the
beaker containing acidified permanganate solution. The light
purple colour of the solution fades and finally disappears.
Which of the following is the correct explanation for the
observation?
(b) FeSO4 acts as an oxidising agent and oxidises KMnO4
(c) The colour disappears due to dilution; no reaction is involved
(d) KMnO4 is an unstable compound and decomposes in presence
of FeSO4 to a colourless compound.
7. Which among the following is(are) double displacement
reaction(s)?
(iii) C + O2 CO2
(a) (i) and (iv) (b) (ii) only
(c) (i) and (ii) (d) (iii) and (iv)
8. Which among the following statement(s) is(are) true? Exposure of
silver chloride to sunlight for a long duration turns grey due to
(i) the formation of silver by decomposition of silver chloride
(ii) sublimation of silver chloride
(iii) decomposition of chlorine gas from silver chloride
(iv) oxidation of silver chloride
(a) (i) only (b) (i) and (iii)
(c) (ii) and (iii) (d) (iv) only
07/05/2018
CHEMICAL REACTIONS AND EQUATIONS 3
9. Solid calcium oxide reacts vigorously with water to form calcium
hydroxide accompanied by liberation of heat. This process is
called slaking of lime. Calcium hydroxide dissolves in water to
form its solution called lime water. Which among the following is
(are) true about slaking of lime and the solution formed?
(i) It is an endothermic reaction
(ii) It is an exothermic reaction
(iii) The pH of the resulting solution will be more than seven
(iv) The pH of the resulting solution will be less than seven
(a) (i) and (ii) (b) (ii) and (iii)
(c) (i) and (iv) (d) (iii) and (iv)
10. Barium chloride on reacting with ammonium sulphate forms
barium sulphate and ammonium chloride. Which of the following
correctly represents the type of the reaction involved?
(i) Displacement reaction
(ii) Precipitation reaction
(iii) Combination reaction
(c) (iv) only (d) (ii) and (iv)
11. Electrolysis of water is a decomposition reaction. The mole ratio of
hydrogen and oxygen gases liberated during electrolysis of water is
(a) 1:1
(b) 2:1
(c) 4:1
(d) 1:2
(i) Dilution of sulphuric acid
(ii) Sublimation of dry ice
(iii) Condensation of water vapours
(iv) Evaporation of water
13. In the double displacement reaction between aqueous potassium
iodide and aqueous lead nitrate, a yellow precipitate of lead iodide
is formed. While performing the activity if lead nitrate is not
available, which of the following can be used in place of lead
nitrate?
4 EXEMPLAR PROBLEMS – SCIENCE
14. Which of the following gases can be used for storage of fresh
sample of an oil for a long time?
(a) Carbon dioxide or oxygen
(b) Nitrogen or oxygen
(d) Helium or nitrogen
15. The following reaction is used for the preparation of oxygen gas
in the laboratory
reaction?
(a) It is a decomposition reaction and endothermic in nature
(b) It is a combination reaction
(c) It is a decomposition reaction and accompanied by release of
heat
in nature
16. Which one of the following processes involve chemical reactions?
(a) Storing of oxygen gas under pressure in a gas cylinder
(b) Liquefaction of air
(c) Keeping petrol in a china dish in the open
(d) Heating copper wire in presence of air at high temperature
17. In which of the following chemical equations, the abbreviations
represent the correct states of the reactants and products involved
at reaction temperature?
(i) 2KClO3 Heat 2KCl + 3O2
(ii) MgO + H2O Mg(OH)2
(a) (i) and (iii) (b) (iii) and (iv)
(c) (ii) and (iv) (d) (ii) and (iii)
07/05/2018
Short Answer Questions
19. Write the balanced chemical equations for the following reactions
and identify the type of reaction in each case.
(a) Nitrogen gas is treated with hydrogen gas in the presence of a
catalyst at 773K to form ammonia gas.
(b) Sodium hydroxide solution is treated with acetic acid to form
sodium acetate and water.
(c) Ethanol is warmed with ethanoic acid to form ethyl acetate in
the presence of concentrated H2SO4 .
(d) Ethene is burnt in the presence of oxygen to form carbon
dioxide, water and releases heat and light.
20. Write the balanced chemical equations for the following reactions
and identify the type of reaction in each case.
(a) Thermit reaction, iron (III) oxide reacts with aluminium and
gives molten iron and aluminium oxide.
(b) Magnesium ribbon is burnt in an atmosphere of nitrogen gas
to form solid magnesium nitride.
(c) Chlorine gas is passed in an aqueous potassium iodide
solution to form potassium chloride solution and solid iodine.
(d) Ethanol is burnt in air to form carbon dioxide, water and
releases heat.
21. Complete the missing components/variables given as x and y in
the following reactions
(b) Cu(s) + 2Ag NO3(aq) Cu(NO3)2(aq) + x(s)
(c) Zn(s) + H2SO4(aq) ZnSO4(x) + H2(y)
(d) CaCO3(s) x CaO(s) + CO2(g)
22. Which among the following changes are exothermic or
endothermic in nature?
(c) Dissolution of sodium hydroxide in water
(d) Dissolution of ammonium chloride in water
23. Identify the reducing agent in the following reactions
(a) 4NH3 + 5O2 4NO + 6H2O
(b) H2O + F2 HF + HOF
(c) Fe2O3 + 3CO 2Fe + 3CO2
(d) 2H2 + O2 2H2O
24. Identify the oxidising agent (oxidant) in the following reactions
(a) Pb3O4 + 8HCl 3PbCl2 + Cl2 + 4H2O
(b) 2Mg + O2 2MgO
25. Write the balanced chemical equations for the following reactions
(a) Sodium carbonate on reaction with hydrochloric acid in equal
molar concentrations gives sodium chloride and sodium
hydrogencarbonate.
precipitates cuprous iodide (Cu2 I2), liberates iodine gas and
also forms potassium sulphate.
26. A solution of potassium chloride when mixed with silver nitrate
solution, an insoluble white substance is formed. Write the chemical
reaction involved and also mention the type of the chemical reaction?
27. Ferrous sulphate decomposes with the evolution of a gas having
a characteristic odour of burning sulphur. Write the chemical
reaction involved and identify the type of reaction.
28. Why do fire flies glow at night?
29. Grapes hanging on the plant do not ferment but after being
plucked from the plant can be fermented. Under what conditions
do these grapes ferment? Is it a chemical or a physical change?
30. Which among the following are physical or chemical changes?
(a) Evaporation of petrol
(c) Heating of an iron rod to red hot.
(d) Curdling of milk
(e) Sublimation of solid ammonium chloride
31. During the reaction of some metals with dilute hydrochloric acid,
following observations were made.
(b) The temperature of the reaction mixture rises when aluminium
(Al) is added.
(c) The reaction of sodium metal is found to be highly explosive
(d) Some bubbles of a gas are seen when lead (Pb) is reacted with
the acid.
07/05/2018
CHEMICAL REACTIONS AND EQUATIONS 7
32. A substance X, which is an oxide of a group 2 element, is used
intensively in the cement industry. This element is present in bones
also. On treatment with water it forms a solution which turns red
litmus blue. Identify X and also write the chemical reactions involved.
33. Write a balanced chemical equation for each of the following
reactions and also classify them.
(a) Lead acetate solution is treated with dilute hydrochloric acid
to form lead chloride and acetic acid solution.
(b) A piece of sodium metal is added to absolute ethanol to form
sodium ethoxide and hydrogen gas.
(c) Iron (III) oxide on heating with carbon monoxide gas reacts
to form solid iron and liberates carbon dioxide gas.
(d) Hydrogen sulphide gas reacts with oxygen gas to form solid
sulphur and liquid water.
34. Why do we store silver chloride in dark coloured bottles?
35. Balance the following chemical equations and identify the type of
chemical reaction.
(e) CaO(s) + SiO2(s) CaSiO3(s)
(f) H2O2(l) U V H2O(l) + O2(g)
36. A magnesium ribbon is burnt in oxygen to give a white compound
X accompanied by emission of light. If the burning ribbon is now
placed in an atmosphere of nitrogen, it continues to burn and
forms a compound Y.
(a) Write the chemical formulae of X and Y.
(b) Write a balanced chemical equation, when X is dissolved in
water.
37. Zinc liberates hydrogen gas when reacted with dilute hydrochloric
acid, whereas copper does not. Explain why?
38. A silver article generally turns black when kept in the open for a few
days. The article when rubbed with toothpaste again starts shining.
(a) Why do silver articles turn black when kept in the open for a
few days? Name the phenomenon involved.
(b) Name the black substance formed and give its chemical
formula.
07/05/2018
Long Answer Questions
39. On heating blue coloured powder of copper (II) nitrate in a boiling
tube, copper oxide (black), oxygen gas and a brown gas X is formed
(a) Write a balanced chemical equation of the reaction.
(b) Identity the brown gas X evolved.
(c) Identity the type of reaction.
(d) What could be the pH range of aqueous solution of the gas X?
40. Give the characteristic tests for the following gases
(a) CO2
(b) SO2
(c) O2
(d) H2
(a) zinc metal is added to copper sulphate solution?
(b) aluminium metal is added to dilute hydrochloric acid?
(c) silver metal is added to copper sulphate solution?
Also, write the balanced chemical equation if the reaction
occurs
42. What happens when zinc granules are treated with dilute solution
of H2SO4, HCl, HNO3, NaCl and NaOH, also write the chemical
equations if reaction occurs.
43. On adding a drop of barium chloride solution to an aqueous
solution of sodium sulphite, white precipitate is obtained.
(a) Write a balanced chemical equation of the reaction involved
(b) What other name can be given to this precipitation reaction?
(c) On adding dilute hydrochloric acid to the reaction mixture,
white precipitate disappears. Why?
44. You are provided with two containers made up of copper and
aluminium. You are also provided with solutions of dilute HCl,
dilute HNO3, ZnCl2 and H2O. In which of the above containers
these solutions can be kept?
07/05/2018
SUMMER VACATION
HOME WORK
CLASS –X
SUBJECT - MATHS
1. Write down formal statement of Euclid’s Division Lemma or Euclid’s Division Algorithm. Also learn it & understand.
2. Write, Learn and understand formal statement of the fundamental theorem of Arithmetic.
3. Practise of proofs of irrational numbers like 3-2√5, 2√3-3, 7/2√3 etc i.e Ex 1.3
4. Practise of proof of irrational numbers √2, √3, √5, √7, √11, √13, √23, √31, √37 etc.
5. Practice of factorisation of quadratic polynomial by splitting the middle term.
6. Practise of division of polynomial by another polynomial taking various examples.
7. Practise of question of all worksheets shared.
8. Solve five questions from each chapter upto 3.4.
KENDRIYA VIDYALAYA KASHIPUR
HOLIDAY HOMEWORK (2020-21)
Short answer type questions
1.what is civil war?
2. What was the major cause of tension in Belgium?
?
3. Describe the ethnic composition of Sri Lanka?
?
4. What factors led to Civil war in Sri Lanka?
?
5. Describe any three demands of Sri Lankan Tamils?
?
6. Write moral and Prudential reason of power sharing?
?
7. what is horizontal distribution of power sharing?
?
8. define federalism?
9. What are the dual objectives of federalism?
?
10. explain two kinds of routes through which federalism have been formed?
- ?
11. What are the differences between Federal Government and unitary government?
?
12. What role is played by judiciary in India?
?
13. Explain any three features which make India a federal country?
?
14. what is a linguistic state?
?
15. Explain the process of unification of Italy?
?
LONG ANSWER TYPE QUESTIONS
1.Describe the impact of napoleonic reforms on the rest of Europe?
?
2. Describe the role of culture in shaping the feeling of Nationalism in Europe?
?
3. Why did Nationalist tensions emerge in the balkans?
?
4. Explain the concept of liberal nationalism which developed in Europe in the early 19th century?
19 ?
5. Write a short note on the unification of Germany?
?
6. How was a nation visualised in 18th and 19th century in Europe explain with the help of two suitable examples?
18 19 ?
8. Describe any five steps taken by the French revolutionaries to create a sense of collective identity among the French people?
?
9. Explain the German liberal movement of 1848?
1848 ?
10. Why was the decade of 1830 known as great economic hardship in Europe?
1830 ?
11. Describe the main elements of the Belgium model of power sharing?
?
12. what are the different forms of power sharing?
- ?
13. what are the key features of federalism?
- ?
14. explain the language policy of India?
?
15. What is decentralization what is the importance of decentralization?
?
B. MAP WORK
Identify and locate the following on the map of India-
1.Place related to peasants satyagraha

2. Place related to movement of Indigo planters

3.Place related to Cotton mill workers movement Satyagraha

4.place related to civil disobedience movement

5. Place related to calling of non cooperation movement

6. Place related to congress session of 1927
1927
7. Place related to congress session September 1920
1920
8. place related to congress session of December 1920
1920
GEOGRAPHY
16 .kalol
19. Kolkata
20. Haldia
1.Power sharing
2.Federalism


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– 2020-21
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