States of Matter (NEET Chemistry): Questions 82 - 88 of 103

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Question number: 82

» States of Matter » Solid State » Calculations Involving Unit Cell Parameters

MCQ▾

Question

The atomic radius (r) in simple cubic unit cell is?

Choices

Choice (4) Response
a.

a/2

b.

2a

c.

a/√2

d.

a/4

Question number: 83

» States of Matter » Solid State » Packing in Solids (Fcc, Bcc and Hcp Lattices)

MCQ▾

Question

Chromium metal crystallizes with a body centered cubic lattice. The length of the unit cell edge is found to be 287 pm. Calculate the atomic radius?

Choices

Choice (4) Response
a.

1.98 A°

b.

2.19 A°

c.

2.56 A°

d.

1.85 A°

Question number: 84

» States of Matter » Solid State » Imperfection in Solids

MCQ▾

Question

What type of defect will be occurred in FeS solid?

Choices

Choice (4) Response
a.

Anion vacancies

b.

Interstitial defect

c.

Metal deficiency defect

d.

Dislocation defect

Question number: 85

» States of Matter » Solid State » Calculations Involving Unit Cell Parameters

MCQ▾

Question

Sodium metal exists in the bcc unit cell. The distance between nearest sodium atoms is 0.368 nm. The edge length of the unit cell is?

Choices

Choice (4) Response
a.

1.67 nm

b.

0.425 nm

c.

0.563 nm

d.

1.451 nm

Question number: 86

» States of Matter » Solid State » Covalent and Metallic Solids

MCQ▾

Question

The crystal that have metal ion as lattice point surrounded by a sea of mobile electrons is known as?

Choices

Choice (4) Response
a.

Covalent crystal

b.

Metallic crystal

c.

Ionic crystal

d.

Molecular crystal

Question number: 87

» States of Matter » Solid State » Covalent and Metallic Solids

MCQ▾

Question

Which of the following is an example of covalent crystal?

Choices

Choice (4) Response
a.

Aluminium nitride

b.

Silicon carbide

c.

Diamond

d.

Tin oxide

Question number: 88

» States of Matter » Solid State » Imperfection in Solids

MCQ▾

Question

Which of the following expression can give the number of point defects per unit volume?

Choices

Choice (4) Response
a.

n=Ne2W/RT

b.

n=N/eW/2RT

c.

n=NeW/2RT

d.

n=NeW/RT

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