ECAT Pre Computer Science Chapter 21 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 21 Nuclear Physics

Try The MCQ's Test For ECAT Physics Chapter 21 Nuclear Physics

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ECAT Physics Chapter 21 Nuclear Physics

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Question # 1

In 1932 Chadwick discovered

Question # 2

Nucleus of a hydrogen atom may contain:

Question # 3

Phenomenon of radioactivity is due to disintegration of

Question # 4

The half life of uranium-238 is

Question # 5

When a nucleus emits an alpha particles, its charge number decreases by

Question # 6

Different radioactive material have

Question # 7

An alpha particle has a charge of

Question # 8

The total charge of any nucleus is given as

Question # 9

Neon gas have three isotopes whose atomic numbers are

Question # 10

Hydrogen atom with only one proton and one neutron in its nucleus, and one electron, is called

Question # 11

Fraction of the decaying atoms per unit time is called

Question # 12

Rate of decay is actually described by.

Question # 13

The chemical behaviour of an atom is determined by

Question # 14

Which of the following material has longer half life

Question # 15

The amount of energy equivalent to 1 a.m.u is

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Charge on neutron is
A. 1.6 x 10-19C
B. zero
C. -1.6 x 10-19C
D. 1.2 x 10-19C
2 The reciprocal of decay constant λ of a radioactive material is:
A. Frequency
B. Half life
C. Year
D. Mean life
3 The penetration power ofβ-particle is
A. zero
B. less thanα-particle
C. equal toα-particle
D. greater thanα-particle
4 Radiation detector are used to
A. measure intensity of radiation
B. measure energy of radiation
C. difference between different types of radiation
D. all the above
5 The range ofβ-particle in air is greater than that ofα-particle by
A. 1000 times
B. 100 times
C. 15 times
D. 10 times
6 The total charge of any nucleus is given as
A. Ze2
B. Z2e
C. Z/e
D. Ze
7 When certain nucleus emits anα particle, its mass number:
A. Increases by one
B. Decreases by one
C. Remain same
D. Decreases by four
8 How many isotopes of helium are present?
A. 1
B. 2
C. 3
D. 4
9 The rate of decay of a radioactive substance
A. decrease exponentially with time
B. decreases linearly with time
C. increases linearly with time
D. increases exponentially with time
10 The nucleus/nuclei of hydrogen is/are:
A. Proton
B. Deuteron
C. Triton
D. All of these

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