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

00:00
Question # 1

A curie represents a very strong source of

Question # 2

The half life of uranium-238 is

Question # 3

Mass of proton is of order of

Question # 4

For Protium, the mass defect is:

Question # 5

Charge on neutron is

Question # 6

The unit of decay constant is:

Question # 7

Which of the following material has smaller has life

Question # 8

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

Question # 9

Which are not the elementary particles?

Question # 10

There is present in paraffin a large amount of:

Question # 11

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

Question # 12

A pair of quark and antiquark makes a:

Question # 13

Mass of proton is

Question # 14

When certain nucleus emits anα particle, its mass number:

Question # 15

Electrons are

Question # 16

1 amu is equal to.

Question # 17

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 # 18

Nucleus consists of

Question # 19

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

Question # 20

Alfa particles are

Question # 21

γ-rays are

Question # 22

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

Question # 23

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

Question # 24

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

Question # 25

A mass spectrograph sort out

Question # 26

The rate of decay of radioactive substance

Question # 27

Curie is a unit of

Question # 28

Neutron was disvovered by:

Question # 29

The time required for a radioactive material to decrease in active by one half is called

Question # 30

Radioactivity is

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Radioactivity was discovered by
A. Rutherford
B. Henri Becqureal
C. Maxwell
D. James Chadwick
2 When certain nucleus emits aβ-particles, is mass number:
A. Remain same
B. Increases by one
C. Decreases by one
D. Decreases by four
3 Examples of moderators used in a fission reactor is/are:
A. Water
B. Heavy water
C. Carbon
D. Hydrocarbon
4 In wilson cloud chamber, the air becomes saturated with:
A. Alcohol vapours
B. Water
C. Helium gas
D. Nitrogen gas
5 The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains
A. 3 more neutrons
B. 3 more electrons
C. 3 more protons
D. 3 more ions
6 Proton was discovered by Rutherford in
A. 1915
B. 1906
C. 1910
D. 1920
7 During the nuclear changes, the law/s of conservation that hold/s are that of:
A. Charge
B. energy
C. Momentum
D. Mass
8 Beta particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
9 Heavy water is made of one oxygen atom and two atoms of:
A. Protium
B. Deuterium
C. Tritium
D. Any of these
10 Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:
A. 50
B. 100
C. 150
D. 200

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