NEET (National Eligibility cum Medical Entrance Test) Chemistry: Questions 521 - 527 of 1145

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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

Question number: 524

» States of Matter » Solid State » Ionic

MCQ▾

Question

How many chloride ions are there around sodium ion in sodium chloride crystal?

Choices

Choice (4) Response

a.

3

b.

8

c.

4

d.

6

Question number: 525

» States of Matter » Solid State » Voids

MCQ▾

Question

Which of the following crystal has the Antifluorite structure?

Choices

Choice (4) Response

a.

Na2O

b.

HgS

c.

AgCl

d.

AgI

Question number: 526

» Chemical Kinetics » Collision Theory of Bimolecular Gaseous Reactions

MCQ▾

Question

According to Arrhenius theory, the rate is directly proportional to the number of effective collisionsEquation , here Z is?

Choices

Choice (4) Response

a.

Collision fraction

b.

Collision frequency

c.

Collision coefficient

d.

None of the above

Question number: 527

» Chemical Kinetics » Differential and Integral Forms of Zero and First Order Reactions

MCQ▾

Question

A substance reacts with initial concentration of a mol/dm3 according to zero order kinetics. The time it takes for the completion of the reaction is (k = rate constant)?

Choices

Choice (4) Response

a.

k/a

b.

a/2k

c.

2k/a

d.

a/k

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