Atoms and Nuclei-Radioactive Decay Law (AIIMS Physics): Questions 1 - 5 of 8

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Question number: 1

» Atoms and Nuclei » Radioactive Decay Law

MCQ▾

Question

Equation has 92 protons and 238 nucleons. It decays by emitting an Alpha particle and becomes –

Choices

Choice (4) Response

a.

Np

b.

Equation

c.

Th

d.

All of the above

Question number: 2

» Atoms and Nuclei » Radioactive Decay Law

Appeared in Year: 2005

MCQ▾

Question

A radioactive material has a half – life of 10 days. What fraction of the material would remain after 30 days –

Choices

Choice (4) Response

a.

0.25

b.

0.5

c.

0.125

d.

0.33

Question number: 3

» Atoms and Nuclei » Radioactive Decay Law

Appeared in Year: 2003

Assertion-Reason▾

Assertion (Ꭺ)

Radioactive nuclei emit Equation - particles.

Reason (Ꭱ)

Electrons exist inside the nucleus.

Choices

Choice (4) Response

a.

Ꭺ is true but Ꭱ is false

b.

Both Ꭺ and Ꭱ are false

c.

Ꭺ is false but Ꭱ is true

d.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

Question number: 4

» Atoms and Nuclei » Radioactive Decay Law

Appeared in Year: 2004

Assertion-Reason▾

Assertion (Ꭺ)

90Sr from the radioactive fail out from a nuclear bomb ends up in the bones of human beings through the milk consumed by them. It causes impairment of the production of red blood cells.

Reason (Ꭱ)

The energetic Equation – particles emitted in the decay of 90Sr damage the bone marrow.

Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

b.

Both Ꭺ and Ꭱ are false

c.

Ꭺ is true but Ꭱ is false

d.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

Question number: 5

» 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

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