Physical Chemistry MCQ with Answers

Physical Chemistry MCQ with Answers

61) The number of equidistant oppositely charged ions in NaCl crystal is:

Answer is:

6

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

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

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

Answer is:

2x pm

Explanation:

a = 2d⁄√3

64) Schottky defect generally appears in:

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:

Answer is:

B₃A₄

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