MCQs (One or More Correct Option): The Solid State and Surface Chemistry

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Test: MCQs (One or More Correct Option): The Solid State & Surface Chemistry | JEE Advanced - Question 1

Which of the following statement(s) is (are) correct?(1998 - 2 Marks)

A.
The coordination number of each type of ion in CsCl crystal is 8.
B.
A metal that crystallizes in bcc structure has acoordination number of 12.
C.
A unit cell of an inoic crystal shares some of its ions with other unit cells.
D.
The length of the unit cell in NaCl is 552 pm. (r_Na⁺ = 95pm; r_Cl^–=181 pm).

Detailed Solution: Question 1

The crystals of CsCl has body - centred cubic unit cell. Hence, each ion in this structure has coordination number of eight.

NOTE : In case of crystals of NaCl two
interpenetrating face-centred cubic lattices are
present, one of these is composed entirely of Na⁺ ions and the other of Cl^– ions. Each Na⁺ ion is located half way between two Cl^– ions and viceversa. A unit cell of NaCl crystal has Cl^– ions at the corners as well as at the face centres and Na⁺ ions are located in
octahedral voids. On each edge of cubic unit cell, there are two Cl^– ions and one Na⁺ ions. Hence

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Test: MCQs (One or More Correct Option): The Solid State & Surface Chemistry | JEE Advanced - Question 2

The correct statement(s) regarding defects in solids is (are) (2009S)

A.
Frenkel defect is usually favoured by a very smalldifference in the sizes of cation and anion
B.
Frenkel defect is a dislocation defect
C.
Trapping of an electron in the lattice leads to theformation of F-centre
D.
Schottky defects have no effect on the physicalproperties of solids

Detailed Solution: Question 2

(b,c)
Frenkel defect is a dislocation effect, observed when the size of the cation and anion differ largely. F-center is created when an anion is lost from the lattice and vacancy is filled by trapping of an electron. Schottky defect changes the density of a crystalline solid.

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Test: MCQs (One or More Correct Option): The Solid State & Surface Chemistry | JEE Advanced - Question 3

The correct statement(s) pertaining to the adsorption of agas on a solid surface is (are) (2011)

A.
Adsorption is always exothermic
B.
Physisorption may transform into chemisorption at high temperature
C.
Physiosorption increases with increasing temperaturebut chemisorption decreases with increasingtemperature
D.
Chemisorption is more exothermic than physiosorption,however it is very slow due to higher energy of activation

Detailed Solution: Question 3

(a, b, d)
(a) ΔH is negative for adsorption
(b) Fact based
(d) Chemical bonds are stronger than vander Waal’s forces, so chemical adsorption is more exothermic

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Test: MCQs (One or More Correct Option): The Solid State & Surface Chemistry | JEE Advanced - Question 4

Choose the correct reason(s) for the stability of the lyophobiccolloidal particles. (2012)

A.
Preferential adsorption of ions on their surface fromthe solution.
B.
Preferential adsorption of solvent on their surface from the solution.
C.
Attraction between different particles having opposite charges on their surface.
D.
Potential difference between the fixed layer and the
diffused layer of opposite charges around the colloidal particles.

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Test: MCQs (One or More Correct Option): The Solid State & Surface Chemistry | JEE Advanced - Question 5

The given graphs/data I, II, III and IV represent general trends observed for different physisorption and chemisorption processes under mild conditions of temperature and presure.

Which of the following choice(s) about I, II, III and IV is (are) correct ? (2012)

A.
I is physisorption and II is chemisorption
B.
I is physisorption and III is chemisorption
C.
IV is chemisorption and II is chemisorption
D.
IV is chemisorption and III is chemisorption

Detailed Solution: Question 5

(a, c)
Graph (I) and (III) represent physisorption because, in
physisorption, the amount of adsorption decreases with the increase of temperature and increases with
the increase of pressure.
Graph (II) represent chemisorption, because in chemisorption amount of adsorption increases with the
increase of temperature. Graph (IV) is showing the formation of a chemical bond, hence chemisorption.

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Test: MCQs (One or More Correct Option): The Solid State & Surface Chemistry | JEE Advanced - Question 6

If the unit cell of a mineral has cubic close packed (ccp) array of oxygen atoms with m fraction of octahedral holes occupied by aluminium ions and n fraction of tetrahedral holes occupied by magnesium ions, m and n, respectively, are (JEE Adv. 2015)

A.
1/2 , 1/8
B.
1 , 1/4
C.
1/2 , 1/2
D.
1/4 , 1/8

Detailed Solution: Question 6

In ccp, O2– ions are 4.
Hence total negative charge = –8
Let Al3+ ions be x, and Mg2+ ions be y.
Total positive charge = 3x + 2y
⇒ 3x + 2y = 8
This relation is satisfied only by x = 2 and y = 1.
Hence number of Al³⁺ = 2.
and number of Mg²⁺ = 1.
⇒ n = fraction of octahedral holes occupied by Al³⁺

and m = fraction of tetrahedral holes occupied by Mg²⁺

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Test: MCQs (One or More Correct Option): The Solid State & Surface Chemistry | JEE Advanced - Question 7

When O₂ is adsorbed on a metallic surface, electron transferoccurs from the metal to O₂. The true statement(s) regardingthis adsorption is(are) (JEE Adv. 2015)

A.
O₂ is physisorbed
B.
Heat is released
C.
Occupancy of of O₂ is increased
D.
Bond length of O₂ is increased

Detailed Solution: Question 7

Reaction on metal surface

This is an example of chemisorption

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Test: MCQs (One or More Correct Option): The Solid State & Surface Chemistry | JEE Advanced - Question 8

The CORRECT statement(s) for cubic close packed (ccp)three dimensional structure is (are) (JEE Adv. 2016)

A.
The number of the nearest neighbours of an atompresent in the topmost layer is 12
B.
The efficiency of atom packing is 74%
C.
The number of octahedral and tetrahedral voids peratom are 1 and 2, respectively
D.
The unit cell edge length is times the radius ofthe atom

Detailed Solution: Question 8

CCP is ABC ABC …… type packing
(A) In topmost layer, each atom is in contact with 6 atoms in same layer and 3 atoms below this layer

(B) Packing fraction =

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MCQs (One or More Correct Option): The Solid State & Surface Chemistry

MCQ Practice Test & Solutions: Test: MCQs (One or More Correct Option): The Solid State & Surface Chemistry | JEE Advanced (8 Questions)

Which of the following statement(s) is (are) correct?(1998 - 2 Marks)

The correct statement(s) regarding defects in solids is (are) (2009S)

The correct statement(s) pertaining to the adsorption of agas on a solid surface is (are) (2011)

Choose the correct reason(s) for the stability of the lyophobiccolloidal particles. (2012)

The given graphs/data I, II, III and IV represent general trends observed for different physisorption and chemisorption processes under mild conditions of temperature and presure.

Which of the following choice(s) about I, II, III and IV is (are) correct ? (2012)

If the unit cell of a mineral has cubic close packed (ccp) array of oxygen atoms with m fraction of octahedral holes occupied by aluminium ions and n fraction of tetrahedral holes occupied by magnesium ions, m and n, respectively, are (JEE Adv. 2015)

When O₂ is adsorbed on a metallic surface, electron transferoccurs from the metal to O₂. The true statement(s) regardingthis adsorption is(are) (JEE Adv. 2015)

The CORRECT statement(s) for cubic close packed (ccp)three dimensional structure is (are) (JEE Adv. 2016)

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Crack JEE with 35 Years of Previous Year Solved Papers

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MCQs (One or More Correct Option): The Solid State & Surface Chemistry

MCQ Practice Test & Solutions: Test: MCQs (One or More Correct Option): The Solid State & Surface Chemistry | JEE Advanced (8 Questions)

Which of the following statement(s) is (are) correct?(1998 - 2 Marks)

The correct statement(s) regarding defects in solids is (are) (2009S)

The correct statement(s) pertaining to the adsorption of agas on a solid surface is (are) (2011)

Choose the correct reason(s) for the stability of the lyophobiccolloidal particles. (2012)

The given graphs/data I, II, III and IV represent general trends observed for different physisorption and chemisorption processes under mild conditions of temperature and presure. Which of the following choice(s) about I, II, III and IV is (are) correct ? (2012)

If the unit cell of a mineral has cubic close packed (ccp) array of oxygen atoms with m fraction of octahedral holes occupied by aluminium ions and n fraction of tetrahedral holes occupied by magnesium ions, m and n, respectively, are (JEE Adv. 2015)

When O2 is adsorbed on a metallic surface, electron transferoccurs from the metal to O2. The true statement(s) regardingthis adsorption is(are) (JEE Adv. 2015)

The CORRECT statement(s) for cubic close packed (ccp)three dimensional structure is (are) (JEE Adv. 2016)

Crack JEE with 35 Years of Previous Year Solved Papers

Crack JEE with 35 Years of Previous Year Solved Papers

Top Courses for JEE

About this JEE Practice Test

Explore more JEE Study Resources

The given graphs/data I, II, III and IV represent general trends observed for different physisorption and chemisorption processes under mild conditions of temperature and presure.

Which of the following choice(s) about I, II, III and IV is (are) correct ? (2012)

When O₂ is adsorbed on a metallic surface, electron transferoccurs from the metal to O₂. The true statement(s) regardingthis adsorption is(are) (JEE Adv. 2015)