www.ThinkITI.com

Home
MCQ
Search
Free Apps
Important
Study Groups
Contact Us
Policy

Home
MCQ
Objective Questions
GS
GS Set-1
Chemistry
Physical Chemistry
62

Physical Chemistry MCQ with Answers

62) Which of the following statements is correct regarding F-center?

F−center produces colour to the crystals

Electrons are held in the void of the crystal

Conductivity increases

All of the above

Answer is:

All of the above

Explanation:

In F-center
* F−center produces colour to the crystals
* Electrons are held in the void of the crystal
* Conductivity increases

Physical Chemistry MCQ with Answers

For more MCQ's Click Here

63) If the distance between Na⁺ and Cl⁻ ions in NaCl crystal is x pm, the length of the edge of unit cell is:

x⁄2 pm

x⁄4 pm

2x pm

4x pm

Answer is:

2x pm

Explanation:

a = 2d⁄√3

64) Schottky defect generally appears in:

KCl

NaCl

CsCl

All of these

Answer is:

All of these

Explanation:

Schottky defect generally appears in
* KCl
* NaCl
* CsCl

65) Anion A²⁻ forms cubic close packing and cation B²⁺ occupies 25% octahedral holes, while cation B³⁺ occupies equal number of tetrahedral and octahedral holes. If number of octahedral holes occupied by B²⁺ and B³⁺ are equal, then formula of the molecule is:

B₃A₄

A₃B₄

AB₂

AB₃

Answer is:

B₃A₄

66) An ionic solid M₂X₃ has a cubic unit cell. Which of the following arrangements of the ions is consistent with the stoichiometry of the compound?

M³⁺ ions occupy the corners and X²⁻ ions center of the faces

X²⁻ ions occupy the corners and M³⁺ ions center of the faces

X²⁻ ions occupy the corners and M³⁺ ions the body center

M³⁺ ions occupy the corners and the body center X²⁻ ions center of the faces

Answer is:

M³⁺ ions occupy the corners and the body center X²⁻ ions center of the faces

Physical Chemistry MCQ with Answers

For more MCQ's Click Here

62) Which of the following statements is correct regarding F-center?

All of the above

Physical Chemistry MCQ with Answers

Related Physical Chemistry MCQ with Answers

63) If the distance between Na+ and Cl− ions in NaCl crystal is x pm, the length of the edge of unit cell is:

2x pm

64) Schottky defect generally appears in:

All of these

65) Anion A2− forms cubic close packing and cation B2+ occupies 25% octahedral holes, while cation B3+ occupies equal number of tetrahedral and octahedral holes. If number of octahedral holes occupied by B2+ and B3+ are equal, then formula of the molecule is:

B3A4

66) An ionic solid M2X3 has a cubic unit cell. Which of the following arrangements of the ions is consistent with the stoichiometry of the compound?

M3+ ions occupy the corners and the body center X2− ions center of the faces

Physical Chemistry MCQ with Answers

63) If the distance between Na⁺ and Cl⁻ ions in NaCl crystal is x pm, the length of the edge of unit cell is:

65) Anion A²⁻ forms cubic close packing and cation B²⁺ occupies 25% octahedral holes, while cation B³⁺ occupies equal number of tetrahedral and octahedral holes. If number of octahedral holes occupied by B²⁺ and B³⁺ are equal, then formula of the molecule is:

B₃A₄

66) An ionic solid M₂X₃ has a cubic unit cell. Which of the following arrangements of the ions is consistent with the stoichiometry of the compound?

M³⁺ ions occupy the corners and the body center X²⁻ ions center of the faces