Atoms and Nuclei (AIIMS Physics): Questions 18 - 24 of 32

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Question number: 18

» Atoms and Nuclei » Radioactive Decay Law

MCQ▾

Question

A radioactive material has a half – life of 8 days. What fraction of the material would remain after 48 days –

Choices

Choice (4) Response

a.

0.156

b.

0.0625

c.

0.625

d.

0.0156

Question number: 19

» Atoms and Nuclei » Composition and Size of Nucleus

MCQ▾

Question

The proposal that no more than two electrons may occupy a particular atomic orbital was made be –

Choices

Choice (4) Response

a.

Curie

b.

Pauling

c.

Pauli

d.

Einstein

Question number: 20

» Atoms and Nuclei » Half Life and Mean Life

MCQ▾

Question

A radioactive substance decays to 110th of its initial activity in 20 days. The half-life of the radioactive substance expressed in days is –

Choices

Choice (4) Response

a.

2

b.

6

c.

8

d.

12

Question number: 21

» Atoms and Nuclei » Radioactive Decay Law

MCQ▾

Question

A radioactive material has a half – life of 8 days. What fraction of the material would remain after 32 days –

Choices

Choice (4) Response

a.

14

b.

18

c.

116

d.

12

Question number: 22

» Atoms and Nuclei » Binding Energy Per Nucleon

MCQ▾

Question

If mass defect of an alpha particle is 0.05 amu, what is its binding energy per nucleon?

Choices

Choice (4) Response

a.

11.6MeV

b.

9.1MeV

c.

4.65MeV

d.

10.3MeV

Question number: 23

» Atoms and Nuclei » Radioactive Decay Law

MCQ▾

Question

A radioactive material has a half – life of 9 days. What fraction of the material would remain after 45 days –

Choices

Choice (4) Response

a.

0.03125

b.

0.625

c.

0.125

d.

0.0156

Question number: 24

» Atoms and Nuclei » Half Life and Mean Life

MCQ▾

Question

A radioactive substance decays to 18th of its initial activity in 48 days. The half-life of the radioactive substance expressed in days is –

Choices

Choice (4) Response

a.

32

b.

8

c.

30

d.

16

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