NEET Chemistry: Questions 517 - 523 of 891

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Question number: 517

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

MCQ▾

Question

Which of the following ionic salts has the wurtzite type of crystal structure?

Choices

Choice (4) Response

a.

NaCl

b.

KBr

c.

ZnS

d.

CaO

Question number: 518

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

MCQ▾

Question

With increasing temperature the electrical conductivity in metallic crystals is?

Choices

Choice (4) Response

a.

Do not effect

b.

Decreases

c.

Increases

d.

None of the above

Question number: 519

» States of Matter » Solid State » Imperfection in Solids

MCQ▾

Question

If molten NaCl contains little amount of CaCl2, this leads to which defect?

Choices

Choice (4) Response

a.

Frankel defect

b.

Impurity defect

c.

Metal deficiency defect

d.

Metal excess defect

Question number: 520

» States of Matter » Solid State » Unit Cell and Lattices

MCQ▾

Question

In the crystal of CsCl, the nearest neighbors of each Cs ion are?

Choices

Choice (4) Response

a.

8 chloride ions

b.

6 chloride ions

c.

8 Cs ions

d.

6 Cs ions

Question number: 521

» States of Matter » Solid State » Ionic

MCQ▾

Question

A particular solid is very hard and has a high melting point. In solid state it is a non conductor of electricity. Classify the solid?

Choices

Choice (4) Response

a.

Amorphous

b.

Metallic

c.

Molecular

d.

Ionic

Question number: 522

» States of Matter » Solid State » Bragg's Law and Its Applications

MCQ▾

Question

X-rays of wavelength 1.54 A0 strike a crystal and are observed to be deflected at an angle of 22.5°. Assuming that n = 1, calculate the spacing between the planes of atoms that are responsible for this reflection?

Choices

Choice (4) Response

a.

4.2 A°

b.

3.71 A°

c.

2.01 A°

d.

3.1 A°

Question number: 523

» States of Matter » Solid State » Unit Cell and Lattices

MCQ▾

Question

In the simple cubic structure, what will be the contribution of atoms per unit cell?

Choices

Choice (4) Response

a.

3

b.

1

c.

2

d.

4

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