Class X SA-II SCIENCE SAMPLE PAPER 2016
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Transcript of Class X SA-II SCIENCE SAMPLE PAPER 2016
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Special Individual A�en�on :One on one classes or doubt classes apart from the regular classes give individual a�en�on to each student. The doubt clearing sessions which will give the student the right push to their goal.
Faculty :This is one of the most important considera�ons while deciding about a coaching centre. We believe good teachers have the ability to transform studentsen�rely from non‐thinkers to intense‐thinkers.It is your responsibility to find out whether the Ins�tute does have Strong Pool of Full �me Faculty Members or not. This is important in case a Faculty leaves the Ins�tute midway so that Ins�tute is capable of filling that vacancy with a Faculty of same Calibre & Exper�se, eventuallysafeguarding your future.
Result :So many coaching ins�tutes show their results but don’t tell about the selec�on ra�o, how many students were enrolled for a course, like, say IIT‐JEE or AIPMT, how many were successful, what percentage of students secured ranked.
Student Teacher Ra�o : Number of students per class is also a factor, the less number of students for class the more is the a�en�on by the teacher on the students and also by the students towards teaching. So check out for number of students the ins�tute divides for a single class.
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At APEX the Student‐Teacher Ra�o is less than 25:1,even at the peak �me. This facilitates proper Student‐Faculty interac�on. Our faculty is always willing to clear doubts of Students even individually, if required.
Apex consider doubts as the stepping stones towards understanding. each �me a modules gets completed its is followed by a doubt class. A doubt classon any topic can be demanded by the student, throughout the year round.
Tes�ng & Feedback system The only parameter to judge one's posi�on in the race is by analyzing the performance in tests. If students are to benefit from feedback,itmust not only be �mely and frequent, but also useful for improving performance byaddressing three areas: what students did well, what students need to improve on,and how to make this improvement.
At Apex, aspirants are exposed through weekly test and all India test series.The weekly tests ensure that aspirants keep their pace with content coverageand keep iden�fying their week areas. Regular tests are conducted and resultsof tests are also sent to aspirants and parents through SMS.
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MOCK TEST PAPERSCIENCE
(class10th)
Boost your IIT-JEE / AIPMT Preparation
1
SECTION A
1. Name the compound formed when ethanol is warmed with ethanoic acid in the
presence of a few drops of conc. H2SO4. [1]
2. What happens to the image distance in the eye when we increase the distance of an
object from the eye? [1]
3. Construct an aquatic food chain showing four trophic levels. [1]
4. Where is the ozone layer located? [1]
5. Nitrogen (atomic number 7) and phosphorus (atomic number 15) belong to group 15
of the Periodic Table. Write the electronic configuration of these elements. Which of
these will be more electronegative? Why? [2]
6. State two main properties of elements on which Mendeleev’s periodic classification
was based. Why could no fixed position be assigned to hydrogen in his periodic table.
[2]
7. Mention two functions of the human ovary. [2]
8. Why is DNA copying an essential part of the process of reproduction? [2]
9. The image of an object is formed on itself when placed at a distance of 30 cm from
a concave mirror. What is the focal length of the concave mirror? [2]
10. Draw a neat labelled diagram showing the course of a ray of light through an
equilateral glass prism and show clearly the angle of incidence and angle of deviation.
[2]
11. Why is the sunlight reaching the earth yellowish? [2]
12. Give two changes which we can adopt in our daily life or habits to reduce the use of
fossil fuel. [2]
13. Why must we conserve our forests? List any two causes for deforestation taking place.
[2]
14. How were the following defects of original Mendeleev’s Periodic Table resolved in the
modified Mendeleev’s Period Table? [3]
(i) Problem of anomalous pairs.
(ii) Position of rare earths
(iii) Position of isotopes.
Instructions : Same as in CBSE Sample Question Paper for SA-2 (Term II)
Maximum Marks : 80 Maximum Time : 3 hours
SCIENCE X TERM-II
MODEL TEST PAPER – 1 (Unsolved)
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2
15. Name the reaction which is commonly used in the conversion of vegetable oils to fats.
Explain the reaction involved in detail. [3]
16. Draw a diagram of a flower to show its male and female reproductive parts. Label on
it :
(a) ovary (b) anther (c) filament (d) stigma [3]
17. How is the equal genetic contribution of male and female parents ensured in the
progeny? [3]
18. Explain the importance of fossils in deciding evolutionary relationships. [3]
19. A man with blood group A marries a woman with blood group O and their daughter
has blood group O. Is this information enought to tell you which of the traits — blood
group A or O — is dominant? Why or why not? [3]
20. A concave lens has a focal length 15 cm. At what distance should an object 10 cm long
be placed so that it forms an image 10 cm from the lens? Find the nature and size of
the image formed. [3]
21. Draw a ray diagram showing the path of rays of light when it enters with oblique
incidence. [3]
(i) from air into water
(ii) from water into air
22. Make a diagram to show how hypermetropia is corrected. The near point of a
hypermetropic eye is 1m. What is the power of lens required to correct this defect?
Assume that the near point of the normal eye is 25 cm. [3]
23. Elements A B C D [5]
Electronic configuration 1 2, 1 2, 4 2, 8, 7
The table above shows the electronic configuration of elements from A to D. By
drawing dot diagrams show the formation of compounds between :
(i) A and B (ii) A and D (iii) A and C (iv) B and C
(v) B and D (vi) C and D
OR
(i) Define combustion. [5]
(ii) Why is the flame of an unsaturated hydrocarbon sooty?
(iii) Give a reaction other than oxidation which is a characteristic of saturated
hydrocarbons.
(iv) Which of the following hydrocarbons undergo addition reactions? Support your
answer by a chemical equation.
C2H
6, C
3H
8, C
2H
2 and CH
4
24. (i) Only through labelled diagrammatic representations, represent the process of
budding as seen in Hydra. [5]
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3
(ii) What is vegetative propagation? Classify giving suitable examples.
OR
(i) What is the structure of the embryo sac? [5]
(ii) What is the importance of the menstrual cycle?
25. (i) A beam of light is incident through the holes on side A and emerges out of the
hole on the other face of the box as shown in the figure. [5]
10987654321
A B1
23456789
10
Box
What type of lens is present inside the box?
(ii) Two thin lenses of power + 2.5 D and –1.5 D are placed in contact with each
other. Calculate : (a) power of the combination, (b) focal length of the
combination.
OR
(i) One half of a convex lens is covered with a black paper. Will this lens produce a
complete image of the object? Verify your answer and explain your observation.
(ii) P1 and P
2 are the power of two thin lenses. What is the power P when both lenses
are placed in contact with one another? [5]
SECTION B
26. A bright nail is placed in a beaker containing aqueous copper sulphate solution.When
the iron nail is taken out of copper sulphate solution after 15 minutes, its surface is
coated with : [1]
(a) reddish deposit (b) greenish deposit (c) black deposit (d) white deposit
27. Zinc granules were added to zinc sulphate, copper sulphate, aluminum sulphate and
iron sulphate solutions as shown below. You would observe the deposition of metal on
zinc granules in the beakers :
I II III IV
(a) I and III (b) II and IV (c) I and II (d) III and IV
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4
28. Ethanoic acid reacts with sodium bicarbonate : [1]
(a) vigorously with lot of effervescence (b) slowly
(c) at a moderate rate without effervescence (d) none of these
29. 5 ml each of acetic acid and water are mixed together and shaken well.: [1]
The resulting mixture would appear as in :
(a) I (b) II (c) III (d) IV
30. The odour of acetic acid resembles that of : [1]
(a) rose (b) burning plastic (c) vinegar (d) kerosene
31. A student determines the focal length of a device X,
by focussing the image of a far off object on the
screen positioned as shown in the figure below.
The device X is a :
(a) Convex lens (b) Concave lens
(c) Convex mirror (d) Concave mirror
32. The focal length of the concave mirror in the
experimental set up, shown below, equals :
(a) 10.3 cm (b) 11.0 cm
(c) 11.7 cm (d) 12.2 cm
33. A student performs an experiment on finding
the focal length of a convex lens by keeping
a lighted candle on one end of a laboratory2 4 6 8 10 12 14 16 18
Screen
X
[1]
[1]
[1]
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5
table, a screen on its other end and the lens between them as shown in the figure. The
positions of the three are adjusted to get a sharp image of the candle flame on the
screen. [1]
If now the candle flame were to be replaced by a distant lamp on a far away electric
pole, the student would be able to get a sharp image of this distant lamp on the screen
by moving :
(a) the screen in the direction of the lens or the
lens in the direction of the screen.
(b) the screen in the direction of the lens or the
lens away from the screen.
(c) the screen away from the lens or the lens in
the direction of the screen.
(d) neither the screen nor the lens.
34. Which one of the following is the best set-up for tracing the path of a ray of light througha rectangular glass slab? [1]
(a) I (b) II (c) III (d) IV
35. A ray of light travelling through medium A enters medium B, such that it bends awayfrom the normal at the surface of separation. From this observation, we can say thatmedium B is : [1]
(a) denser than medium A (b) rarer than medium A
(c) of the same optical density as A (d) none of these
36. The diagram given alongside illustrates [1]
(a) bud formation in yeast
(b) binary fission in Amoeba
(c) formation of daughter cells in yeast
(d) pseudopodia formation in Amoeba
37. A student is given a permanent slide showing binary fission in Amoeba. Following are
the steps in focussing the object under the microscope : [1]
(i) Place the slide on the stage; look through the eye piece and adjust the mirror and
diaphragm to get even illumination.
Candle (C)Lens (L)
Screen (S)
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6
(ii) Look through the eye piece and raise the objective using coarse adjustment until
the object is focused.
(iii) Make the focus sharp with the help of fine adjustment.
(iv) Look through the eye piece and move the slide until the object is visible.
The proper sequence of steps is
(a) (i), (iii), (iv), (ii) (b) (ii), (iii), (iv), (i)
(c) (iv), (iii), (ii), (i) (d) (i), (iv), (ii), (iii)
38. Following are the sketches made by some students. [1]
The sketch not illustrative of budding in yeast is
(a) A (b) B (c) C (d) D
39. A student soaked 5 grams of raisins in 25 ml of distilled water in each of the two
beakers A and B. Beaker A was maintained at 25ºC and beaker B at 50ºC. After one
hour, the student observed that the water absorbed by the raisins was : [1]
(a) same in case of A and B (b) less in case of A than in B
(c) exactly double in A, of that in B (d) exactly four times in A, of that in B
40. When kept in 10% sugar solution raisins swell up due to : [1]
(a) endosmosis (b) exosmosis (c) plasmolysis (d) diffusion
41. If ‘x’ is the initial weight of raisins and ‘y’ is the final weight (after soaking),
percentage of water absorbed by the raisins is given by : [1]
(a) 100x y
x
−× (b) 100
y x
y
−× (c) 100
x y
y
−
× (d) 100y x
x
−×
ANSWERS
9. 15 cm 20. (i) –30 cm, 3.33 cm 22. + 3D 25. (a) + 1.0 D (b) 1 m
26. (a) 27. (b) 28. (a) 29. (c) 30. (c) 31. (d) 32. (b) 33. (b)
34. (d) 35. (b) 36. (b) 37. (d) 38. (c) 39. (b) 40. (a) 41. (d)
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