Atoms and Nuclei-Radioactivity (NEET Physics): Questions 6 - 10 of 10

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Question number: 6

» Atoms and Nuclei » Radioactivity

MCQ▾

Question

If 92 U 238 undergoes successively 8 α -decays and 6 β -decays, then resulting nucleus is,

Choices

Choice (4) Response

a.

82 U 206

b.

82 U 214

c.

82 U 210

d.

82 Pb 206

Question number: 7

» Atoms and Nuclei » Radioactivity

Assertion-Reason▾

Assertion (Ꭺ)

The mass of β -particles when they are emitted is higher than the mass of electrons obtained by other means.

Reason (Ꭱ)

β -particle and electron, both are similar particles.

Choices

Choice (4) Response

a.

Ꭺ is true but Ꭱ is false

b.

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

c.

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

d.

Both Ꭺ and Ꭱ are false

Question number: 8

» Atoms and Nuclei » Radioactivity

MCQ▾

Question

10 In the nuclear reaction,

U92238ThZA+He24

the values of A and Z are-

Choices

Choice (4) Response

a.

A = 234, Z = 94

b.

A = 238, Z = 90

c.

A = 234, Z = 90

d.

A = 238, Z = 94

Question number: 9

» Atoms and Nuclei » Radioactivity

MCQ▾

Question

In the disintegration series

92235UαXβZAY

The value of Z and A respectively will be,

Choices

Choice (4) Response

a.

90, 234

b.

91, 231

c.

88, 230

d.

92, 240

Question number: 10

» Atoms and Nuclei » Radioactivity

Appeared in Year: 2016

MCQ▾

Question

The half – life of a radioactive substance is 30minutes . The time (in minutes) taken between 40 % decay and 85 % decay of the same radioactive substance is:

Choices

Choice (4) Response

a.

60

b.

30

c.

15

d.

45

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