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

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Question # 1

The energy is found from Einstein's mass energy relation is called

Question # 2

For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is

Question # 3

Pair production take place when energy ofγ-rays photon is

Question # 4

The penetration power ofβ-particle is

Question # 5

If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be

Question # 6

The nucleus/nuclei of hydrogen is/are:

Question # 7

1 amu is equal to

Question # 8

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

Question # 9

Referring to the above figure, we can say that of all the elements, the most stable element is

Question # 10

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

Question # 11

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

Question # 12

β-particles are easily deflected by collisions than heavy

Question # 13

Heavy water is made of one oxygen atom and two atoms of:

Question # 14

Nucleus of a hydrogen atom may contain:

Question # 15

Proton was discovered by Rutherford in

Question # 16

Phenomenon of radioactivity is due to disintegration of

Question # 17

When certain nucleus emits anα particle, its mass number:

Question # 18

The isotope/s of hydrogen is /are:

Question # 19

In radio-active decay, the original element which disintegrate to another element is called

Question # 20

The chemical behaviour of an atom is determined by

Question # 21

The distance travelled byα-particle in a medium before coming to rest, is called

Question # 22

Which of these is not a radiation detector

Question # 23

Neutron was disvovered by:

Question # 24

There is present in paraffin a large amount of:

Question # 25

Beta particles are

Question # 26

The number of protons inside a nucleus is called

Question # 27

How many isotopes of helium are present?

Question # 28

The range of particle depends upon the factor

Question # 29

Marie curie and Pierre curie discovered:

Question # 30

Different radioactive material have

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Which of the following material has longer half life
A. radium
B. polonium
C. radium
D. uranium
2 When a charged particle passes through matter, it produces ionization, this effect is used in
A. fission reaction
B. reactor
C. radiation detector
D. fusion reaction
3 In wilson cloud chamber, the air becomes saturated with:
A. Alcohol vapours
B. Water
C. Helium gas
D. Nitrogen gas
4 The isotope/s of hydrogen is /are:
A. Protium
B. Deuterium
C. Tritium
D. Both (A) and (B)
5 The rate of decay of radioactive substance
A. is constant
B. decrease exponentially with time
C. varies inversely as time
D. decreases linearly with time
6 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
7 The number of protons inside a nucleus is called
A. mass number
B. atomic weight
C. atomic number
D. none of these
8 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
9 Neutron was discovered in
A. 1915
B. 1920
C. 1925
D. 1932
10 The total charge of any nucleus is given as
A. Ze2
B. Z2e
C. Z/e
D. Ze

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