NEET (NTA)-National Eligibility cum Entrance Test (Medical) Chemistry: Questions 479 - 485 of 1258

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Question number: 479

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

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MCQ▾

Question

An element ‘A’ has face centered cubic structure with edge length equal to 361 pm. The apparent radius of atom ‘A’ is?

Choices

Choice (4) Response

a.

127.6 pm

b.

180.2 pm

c.

160.5 pm

d.

64 pm

Question number: 480

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

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Question

How many init cells are present in 39 grams of potassium that crystallizes in body-centered cubic structure?

Choices

Choice (4) Response

a.

0.5

b.

c.

0.75

d.

Question number: 481

» States of Matter » Solid State » Voids

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Question

Which of the following compound are used in memory units of computers?

Choices

Choice (4) Response

a.

Zinc sulphides

b.

Potassium bromide

c.

Ferrites

d.

Sodium oxides

Question number: 482

» States of Matter » Solid State » Classification of Solids

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MCQ▾

Question

Which of the following statements is not true about ionic crystals?

Choices

Choice (4) Response

a.

These are crystalline solids at room temperature

b.

Soluble in polar solvents

c.

These are good conductors in solid state

d.

These are quite hard in nature

Question number: 483

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

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MCQ▾

Question

At room temperature, sodium crystallizes in body centered cubic lattice with Calculate the theoretical density of sodium?

Choices

Choice (4) Response

a.

1.002 g/cm3

b.

2.004 g/cm3

c.

3.5 g/cm3

d.

None of the above

Question number: 484

» States of Matter » Solid State » Imperfection in Solids

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MCQ▾

Question

Which of the following defect causes decrease in the density of a crystal?

Choices

Choice (4) Response

a.

Shottky

b.

Interstitial

c.

F-centered

d.

Frenkel

Question number: 485

» States of Matter » Solid State » Imperfection in Solids

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MCQ▾

Question

Which of the following compound is also known as Berthollide compound?

Choices

Choice (4) Response

a.

Zinc oxide

b.

Vanadium oxide

c.

Ferrous oxide

d.

All a. , b. and c. are correct