NEET (NTA)-National Eligibility cum Entrance Test (Medical) Chemistry: Questions 507 - 513 of 1258

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Question number: 507

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

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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.

1.451 nm

b.

1.67 nm

c.

0.563 nm

d.

0.425 nm

Question number: 508

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

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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.

Metallic crystal

b.

Molecular crystal

c.

Covalent crystal

d.

Ionic crystal

Question number: 509

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

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MCQ▾

Question

Which of the following is an example of covalent crystal?

Choices

Choice (4) Response

a.

Aluminium nitride

b.

Diamond

c.

Tin oxide

d.

Silicon carbide

Question number: 510

» States of Matter » Solid State » Imperfection in Solids

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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: 511

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

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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.

143.93 pm

b.

151.98 pm

c.

271 pm

d.

201.70 pm

Question number: 512

» States of Matter » Solid State » Imperfection in Solids

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MCQ▾

Question

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

Choices

Choice (4) Response

a.

Crystalline stability decrease

b.

Entropy increases

c.

No change in density

d.

All of the above

Question number: 513

» States of Matter » Solid State » Voids

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Question

What is the general formula of compound having spinel structure?

Choices

Choice (4) Response

a.

b.

c.

AB2O3

d.