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

Test-1/SS,LS/Set-P 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-P

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. If in one mol of NaCl crystal all the sodium ions at body centre are replaced by Al+3

. Number of cation

vacancies formed are close to

(a) 1.504 × 1023

(b) 7.52 × 1022

(c) 3.01 × 1022

(d) 3.01 × 1023

2. 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

11.56 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

3. Highest coordination number for an anion is found in

(a) ZnS structure (b) Rock salt structure

(c) Flourite structure (d) Anti fluorite structure

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

found to be Cu1.9O. The percentage of Cu++

ion in this oxide is

(a) %19

100 (b) %

5.19

100 (c) %

5.19

500 (d) %

195

500

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

tetrahedral void is –

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

CODE

P

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



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

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

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

7. Which of the following is a covalent solid

(a) graphite (b) Phosphorus (c) Sulphur (d) iodine

8. An element ‘A’ (atomic mass = 50 gm/mol) crystallises in ABABAB 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

9. Which of the following is correct set for a solution of C2H5OH in H2O.

(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

10. In ABCABC like packing if one unit cell contain 6 atoms of ‘A’ layer than number of atoms from ‘B’

layer are –

(a) 6 (b) 7 (c) 8 (d) 4

11. 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

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

1 of

octahedral 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

13. 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 higher 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

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

(a) 52 % (b) 74 %

(c) 68 % (d) 78 %

15. Total number of octahedral 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

16. ‘F’ centre is formed when –

(a) LiCl crystal is heated strongly with MgCl2 crystals

(b) LiCl crystal is heated in Cl2 gas

(c) LiCl crystal is heated in Lithium vapours

(d) All of these



17. In which case the observed value of magnetic moment is less than expected value of magnetic moment

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

18. The vapour pressure of 1 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

19. Which of the following solution has lowest value of osmotic pressure at 300 K

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

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

20. Which of the following is most soluble in n-octane solvent

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

21. Molar solubility of Helium, nitrogen and oxygen are plotted against partial pressure of the gas at

constant temperature

Henry’s law constant for these gases will lie in following

sequence?

(a) O2 > N2 > He

(b) O2 < N2 < He

(c) O2 = N2 = He

(d) O2 > N2 < He

22. The vapour pressure of three aqueous solutions s1, s2 and s3 of same solute at different concentrations are

plotted against temperature in Kelvin

The concentration of these solutions will be in the order

(a) s1 = s2 = s3

(b) s1 < s2 < s3

(c) s3 < s2 < s1

(d) s1 < s3 < s2

23. 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

24. 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 Space for rough work Space for rough work Space for rough work Space for rough work



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. 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

XA = 1 XB = 1

Mole fraction

(a) 3

4 (b)

4

3 (c)

2

1 (d) 3

1

28. 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

29. Volume in liters of 0.05 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

30. 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 8.89 × 10–x

mols of O2 are soluble in water , value of ‘x’ is –

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

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

9 19 29

10 20 30 (b) / if not attempted than Bonus

CODE

P

Roll No.

Name of the student





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