Type : JEE MAIN 2015-16 TEST-1/Class 12 th /Set-Q Q

Test-1/SS,LS/Set-Q Mittal Sir

BMC CLASSES Page No - 1 III-A/172, Nehru Nagar Ghaziabad. Ph : 0120-4102287, 9811212090 email: [email protected] web: www.bmcchemistry.com

III-A/172 , Nehru Nagar Ghaziabad. Ph : 9811212090, 9868502091. email : [email protected], website : www.bmcchemistry.com

Type : JEE MAIN 2015-16

TEST-1/Class 12th

/Set-Q

Topic : SOLID STATE, LIQUID SOLUTION

Date : 3

rd MAY 2015

Max Marks : 120 Time : 45 minutes

Single Correct Answer Type (+4/-1) Each question has 4 choices (a), (b), (c) and (d) for its answer, out of which ONLY ONE is correct.

1. Which of the following give colour to LiCl crystal

(a) Frankel defect (b) Schottky defect (c) F centre (d) Mg++

impurity

2. In which case the observed value of magnetic moment is zero while expected value of very higher

(a) Ferrimagnetic (b) Ferromagnetic (c) Diamagnetic (d) Antiferromagnetic

3. The vapour pressure of 2 molal solution of urea at 373 K would be equal to

(a) 1 atm (b) 0.982 atm (c) 1.03 atm (d) 0.964 atm

4. Which of the following solution has highest value of vapour pressure at 300 K

(a) 1% Urea solution (b) 1% sugar solution

(c) 2% Urea solution (d) 5% sugar (cane sugar) solution

5. Which of the following is least soluble in n-octane solvent

(a) C2H5OH (b) Acetonitrile (c) n-Hexane (d) Acetone

6. The curves AB and CD are plotted for vapour pressures of two liquids against temperature in Kelvin.

These curves indicate that :

(a) AB is for solution and CD for the pure solvent

(b) AB is for pure solvent and CD for the solution

(c) AB and CD are both for the same solution

(d) AB and CD are both for the same solvent

CODE

Q

INSTRUCTIONS

General Instructions

1. Ensure matching of OMR sheet code with the Question paper Code before you

start marking your answers on OMR sheet

2. On the answer sheet, darken the appropriate bubble with Blue/Black Pen only.

Use of pencil and any other ink strictly prohibited.

3. Any kind of cutting, rubbing or use of whitener not allowed on answer sheet.

Roll No.

Name of the student



7. Solubility of N2 gas in water follows Henry’s Law. When the solubitly is plotted against partial pressure

at a definite temperature we get following plots:

Which one for temperature is correct?

(a) T1 = T2 = T3 = T4

(b) T1 > T2 > T3 > T4

(c) T1 < T2 < T3 < T4

(d) T1 > T2 > T3 < T4

8. In a binary solution of two volatile liquid shown in graph. The ratio of mole fractions of A to B in

vapour phase of an equimolar solution of two would be

250

200

150

V.P 100

(mmHg) 50

XB = 1 XA = 1

Mole fraction

(a) 3

4 (b)

4

3 (c)

2

1 (d) 3

1

9. A compound ‘AB’ has rock salt structure. If all the atoms present in one of the axes passes through two

opposite edge centres are removed than formula of resulting crystal is –

(a) AB (b) A3B4 (c) A4B3 (d) A8B5

10. Which of the following is a molecular solid

(a) silicon (b) graphite (c) phosphorus (d) diamond

11. An element ‘A’ (atomic mass = 50 gm/mol) crystallises in ABCABCABC like packing. If radius of ‘A’

atom is 200 Pm. The density of crystal is –

(a) 1.45 gm/cm3 (b) 1.83 gm/cm

3 (c) 2.77 gm/cm (d) 2.5 gm/cm

3

12. If in one mol of NaCl crystal all the sodium ions at body centre are replaced by Mg++

. Number of cation

vacancies formed are

(a) 1.504 × 1023

(b) 7.52 × 1022

(c) 3.01 × 1022

(d) 3.01 × 1023

13. The Henery law constant (in kilo pascal) of four gases A, B, C & D at 300 K are 1.78, 2.54, 0.72 and

0.56 respectively. The solubility of these gases in water at 1 atm pressure follow the order

(a) D < B < A < C (b) B < C < A < D (c) B < A < C < D (d) C < A < B < D

14. Which of the following is correct set for a solution of CHCl3 in CH3COCH3

(a) ∆H, ∆V and ∆S all –ve (b) ∆H, ∆V and ∆S all +ve

(c) ∆H = +ve, ∆V = +ve, ∆S = –ve (d) ∆H = –ve, ∆V = –ve, ∆S = +ve

15. Compound ‘AB’ has zinc blende structure in which ‘B’ are in tetrahedral voids. 1 5

In the adjoining figure the ion ‘B’ shown

by ‘ ’ is in touch of four spheres. 4

The sphere number ------- is not

touching ion ‘B’ 2

(a) 3 (b) 2

(c) 4 (d) 5 3



16. An organic compound ‘A’ has molecular formula C6H12O form two volatile liquids A & B which are

enantiomers of each other (optical isomers). At 300 K vapour pressure of pure A and pure ‘B’ are

100 and 80 mmHg respectively. If A & B on mixing form ideal solution than correct statement (s) is/are

(I) ‘A’ has lower boiling point than ‘B’

(II) A solution obtained by dissolving equal masses of ‘A’ and ‘B’ has vapour pressure = 90 mmHg

(III) Intermolecular forces in ‘A’ are lesser than ‘B’.

(a) I only (b) II only (c) II & III (d) I, II & III all

17. Total number of tetrahedral voids in 12 gm of magnesium crystal, ‘Mg’ crystallises in H.C.P structure.

(Mg = 24 u)

(a) 3.01 × 1023

(b) 6.02 × 1023

(c) 1.5 × 1023

(d) 1.2 × 1024

18. Packing efficiency in the two dimensional plane shown in figure (approx)

(a) 52 % (b) 74 %

(c) 68 % (d) 78 %

19. Why is graphite used as a dry lubricant in machinery?

(a) Each carbon atom undergoes sp3 hybridization in graphite

(b) Graphite has layered structure and it cleaves easily between the layers and therefore it is very soft

and slippery

(c) Graphite is a non-conductor of electricity

(d) Graphite has two sigma bonds and two pi bonds

20. From the given graph for an ideal binary solution of two volatile liquids A & B, the vapour pressure of

B when mole fraction of B in vapour phase will become 2

1 .

(a) 222.22 mmHg

(b) 333.33 mmHg

(c) 444.44 mmHg

(d) Condition is not possible

XA= 1 XA= 0

XB=0 XB= 1 21. Highest coordination number for an cation is found in

(a) ZnS structure (b) Rock salt structure

(c) Flourite structure (d) Anti fluorite structure

22. Non stoichiometric cuprous oxide is a ‘p’ type semiconductor. The formula of one of such oxide was

found to be Cu1.95O. The percentage of Cu++

ion in this oxide is

(a) %19

100 (b) %

5.19

100 (c) %

5.19

500 (d) %

195

500

23. The closest distance between two atoms in a crystal having F.C.C structure is 460 p.m. The radius of

octahedral void is –

(a) 51.75 pm (b) 95.22 Pm (c) 190.44 pm (d) 103.5 Pm

24. In ABCABC like packing if one unit cell contain 2 atoms of ‘A’ layer than number of atoms from ‘B’

layer are –

(a) 6 (b) 7 (c) 8 (d) 2

25. Weight of ethylene glycol (M. Wt. = 62) which should be added in 5 kg of water in a car radiator so that

car can be parked at a temperature of –3°C. (kf of H2O = 1.86)

(a) 250 gm (b) 500 gm (c) 750 gm (d) 1000 gm



26. In NaCl ideal lattice the schottky defect is very common. In a NaCl crystal 16.67 % of edge centers and

16.67 % face centers are empty due to schottky defect. The ratio of pyknometric density to ‘X’ ray

density of crystal is –

(a) 3

4 (b)

4

3 (c)

8

7 (d)

7

8

27. Volume in liters of 0.03 M HCl which should be used to completely neutralize 19 gm of equimolar

mixture of Na2CO3 & NaHCO3.

(a) 5 (b) 10 (c) 6 (d) 3

28. Equimolar gaseous mixture

having O2 , CO2 and N2 at PTotal = 12 Bar

10 lit water

300 K temperature

At 300 K KH O2 = 45 K Bar

KH N2 = 90 K Bar

KH CO2 = 1.5 K Bar

At equilibrium approximately 2.67 × 10–x

mols of CO2 are soluble in water , value of ‘x’ is –

(a) 1 (b) 2 (c) 3 (d) 4

29. Solid CO2 is commonly called as dry ice, it is a molecular solid in which CO2 molecules crystallises in

ABABAB like packing. The closest distance between two CO2 molecules of two ‘A’ layers shown in

figure

A ⇒ Ist ‘A’ layer

B

A ⇒ IInd ‘A’ layer

Diameter of CO2 molecule is 400 Pm

(a) 653 Pm (b) 1306 Pm (c) 400 Pm (d) 1008 Pm

30. An element ‘M’ (atomic mass = 100) crystallises in F.C.C unit cell. During crystallisation 2

1 of

tetrahedral voids were occupied by another metal ‘N’ (atomic mass = 20). If volume of unit cell is

6.0 × 10–23

cm3. The density of crystal is –

(a) 49 gm/cm3 (b) 13.3 gm/cm

3 (c) 53.3 gm/cm

3 (d) 12.2 gm/cm

3

Space for rough work Space for rough work Space for rough work Space for rough work



III-A/172 , Nehru Nagar Ghaziabad. Ph : 0120-4102287, 9811212090 email : [email protected] , website : www.bmcchemistry.com

Type : JEE MAIN 2015-16

TEST-1/Class 12th

/Set-Q

Topic : SOLID STATE, LIQUID SOLUTION

Date : 3rd

MAY 2015

Max Marks : 120 Time : 45 minutes

Note : Write your name and roll no. above in box before filling the answers.

Use only blue/black ball pen, use of pencil is strictly prohibited. Straight Objective Type (+4/-1)

A B C D A B C D A B C D

1 11 21

2 12 22

3 13 23

4 14 24

5 15 25

6 16 26

7 17 27

8 18 28 Bonus

9 19 29

10 20 30

CODE

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Type : JEE MAIN 2015-16 TEST-1/Class 12 th /Set-Q Q

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