ECAT Pre General Science Physics Chapter 21 MCQ Test With Answer

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

Try The 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

Phenomenon of radioactivity is due to disintegration of

Question # 2

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

Question # 3

The energy acquired by a mass of 1g moving with the speed of light is

Question # 4

For Protium, the mass defect is:

Question # 5

Neutrons are

Question # 6

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

Question # 7

When a nucleus emits an alpha particle, it atomic mass decreased by

Question # 8

The isotope/s of hydrogen is /are:

Question # 9

The number of isotopes of hydrogen are

Question # 10

Proton was discovered by Rutherford in

Question # 11

γ-rays behave like a particle because they explain the

Question # 12

The rate of decay of radioactive substance

Question # 13

In radioactive decay, the new element which is formed due to the disintegration of original element is called

Question # 14

Which of the following material has smaller has life

Question # 15

Charge on neutron is

Question # 16

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

Question # 17

A mass difference of 0.0012 u is equivalent to and energy of:

Question # 18

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

Question # 19

How many isotopes of helium are present?

Question # 20

A curie represents a very strong source of

Question # 21

The mass of the nucleus is always less than the total man of the protons and neutron that make up the nucleus. The difference of the two masses is called

Question # 22

β-particles are easily deflected by collisions than heavy

Question # 23

Radioactivity is

Question # 24

1 amu is equal to

Question # 25

Different radioactive material have

Question # 26

Alfa particles are

Question # 27

Examples of moderators used in a fission reactor is/are:

Question # 28

After alpha decay the atomic number of the atom

Question # 29

Radiation detector are used to

Question # 30

The rate of decay of a radioactive substance

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The chemical properties of an element depends upon the number of
A. electron
B. position
C. photons
D. neutrons
2 Alfa , beta and gamma rays are emitted from a radio-active substance
A. spontaneously
B. when it is heated
C. when it is exposed to light
D. When it interacts with the other particle
3 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
4 If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by
A. -4
B. 4
C. 2
D. 1
5 Neutron was disvovered by:
A. Rutherford in 1920
B. Chadwick in 1922
C. Bohr in 1913
D. Compton in 1927
6 During the nuclear changes, the law/s of conservation that hold/s are that of:
A. Charge
B. energy
C. Momentum
D. Mass
7 A pair of quark and antiquark makes a:
A. Meson
B. Baryon
C. Proton
D. Neutron
8 Nucleus consists of
A. proton and neutron
B. protons and electron
C. electron and neutron
D. protons only
9 Heavy water is made of one oxygen atom and two atoms of:
A. Protium
B. Deuterium
C. Tritium
D. Any of these
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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