ECAT Pre General Science Physics Chapter 21 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 21 Nuclear Physics

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ECAT Pre General Science Physics Chapter 21 Nuclear Physics

00:00
Question # 1

Radiation detector are used to

Question # 2

Neutron was suggested to be in the nucleus by:

Question # 3

The missing mass which is converted to energy in the formation of nucleus, is called

Question # 4

Neon gas have three isotopes whose atomic numbers are

Question # 5

The nucleus left after the emission of some radiation is called:

Question # 6

The emission of radiations take place in elements, having charge number greater than

Question # 7

Nucleus consists of

Question # 8

Proton was discovered by Rutherford in

Question # 9

The reciprocal of decay constant λ of a radioactive material is:

Question # 10

U-238 present in the natural uranium is about:

Question # 11

The half life of radioactive substances depends upon

Question # 12

Electrons are

Question # 13

Nucleus of a hydrogen atom may contain:

Question # 14

The rate of decay of a radioactive substance

Question # 15

The number if neutrons in the nucleus of 92U235are

Question # 16

In his experiment on nuclear reactions, Rutherford bombardedα particles on:

Question # 17

The range of particle depends upon the factor

Question # 18

The counter, which also provides the power to the G.M. tube is called:

Question # 19

Alfa , beta and gamma rays are emitted from a radio-active substance

Question # 20

In wilson cloud chamber, the air becomes saturated with:

Question # 21

Which are not the elementary particles?

Question # 22

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

Question # 23

Rate of decay is actually described by.

Question # 24

Structure of the nucleus was explained by

Question # 25

Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:

Question # 26

A mass spectrograph sort out

Question # 27

The penetration power ofβ-particle is

Question # 28

The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains

Question # 29

γ-rays are

Question # 30

Neutron was discovered in

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 When a nucleus emits an alpha particle, it atomic mass decreased by
A. 2
B. 1
C. 4
D. 3
2 Examples of moderators used in a fission reactor is/are:
A. Water
B. Heavy water
C. Carbon
D. Hydrocarbon
3 Referring to the above figure, we can say that of all the elements, the most stable element is
A. Phosphours
B. Iron
C. uranium
D. Lithium
4 Mass of proton is of order of
A. 10-31gm
B. 10-27kg
C. 10-24gm
D. 10+27kg
5 Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:
A. 50
B. 100
C. 150
D. 200
6 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
7 After alpha decay the atomic number of the atom
A. increase by four
B. decreases by two
C. increases by two
D. decrease by four
8 γ-rays behave like a particle because they explain the
A. Compton effect
B. Photoelectric effect
C. Pair-production
D. all the above
9 The most abundant isotope of neon is
A. neon-20
B. neon-21
C. neon-22
D. neon-23
10 The energy acquired by a mass of 1g moving with the speed of light is
A. 3 x 108J
B. 9 x 1013J
C. 3 x 1013J
D. 9 x 1016J

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