States of Matter (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Chemistry): Questions 87 - 93 of 104

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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.

b.

c.

d.

Question number: 89

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

MCQ▾

Question

Lithium forms body centered cubic crystals. Calculate the atomic radius of lithium if the length of the side of a unit cell of lithium is 351 pm?

Choices

Choice (4) Response

a.

201.70 pm

b.

143.93 pm

c.

151.98 pm

d.

271 pm

Question number: 90

» States of Matter » Solid State » Imperfection in Solids

MCQ▾

Question

Which of the following is not happened as the consequence of Shottky defect?

Choices

Choice (4) Response

a.

Entropy increases

b.

No change in density

c.

Crystalline stability decrease

d.

All of the above

Question number: 91

» States of Matter » Solid State » Voids

MCQ▾

Question

What is the general formula of compound having spinel structure?

Choices

Choice (4) Response

a.

b.

AB2O3

c.

d.

Question number: 92

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

MCQ▾

Question

The unit cell cube length for LiCl is 5.14 A°. Assuming anion-anion contact, calculate the ionic radius for chloride ion?

Choices

Choice (4) Response

a.

2.34 A°

b.

1.45 A°

c.

2.45 A°

d.

1.82 A°

Question number: 93

» States of Matter » Solid State » Classification of Solids

MCQ▾

Question

Which one of the following has highest melting point?

Choices

Choice (4) Response

a.

Ionic crystal

b.

Molecular crystal

c.

Covalent crystal

d.

Amorphous crystal

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