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

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

Question # 2

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

Question # 3

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

Question # 4

Pair production take place when energy ofγ-rays photon is

Question # 5

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

Question # 6

Neutron was disvovered by:

Question # 7

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

Question # 8

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

Question # 9

The number of protons inside a nucleus is called

Question # 10

The penetration power ofβ-particle is

Question # 11

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

Question # 12

Which of these is not a radiation detector

Question # 13

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

Question # 14

Mass of proton is

Question # 15

Neon gas have three isotopes whose atomic numbers are

Question # 16

Neutrons are

Question # 17

During the nuclear changes, the law/s of conservation that hold/s are that of:

Question # 18

An alpha particle has a charge of

Question # 19

The unit of decay constant is

Question # 20

In wilson cloud chamber, the air becomes saturated with:

Question # 21

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

Question # 22

When certain nucleus emits anα particle, its mass number:

Question # 23

Radiation detector are used to

Question # 24

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

Question # 25

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

Question # 26

Mass of neutron is

Question # 27

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

Question # 28

A particle having the mass of electron and charge of a proton is called a

Question # 29

1 amu is equal to

Question # 30

γ-rays are

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Phenomenon of radioactivity is due to disintegration of
A. nucleus
B. neutron
C. proton
D. molecule
2 There is present in paraffin a large amount of:
A. Nitrogen
B. Hydrogen
C. Carbon
D. Baryllium
3 Rutherford performed an experiment on nuclear reactions in:
A. 1718 A.D
B. 1818 A.D
C. 1918 A.D
D. 2001 A.D.
4 Different radioactive material have
A. same half lives
B. different half lives
C. same mean lives
D. same total lives
5 Radioactivity was discovered by
A. Rutherford
B. Henri Becqureal
C. Maxwell
D. James Chadwick
6 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
7 Electrons are
A. positive charged
B. negatively charged
C. massless
D. neutral
8 Neutron was discovered by
A. Curie
B. Roentgen
C. Chadwick
D. Rutherford
9 For Protium, the mass defect is:
A. Infinite
B. Zero
C. Very large
D. A few grams
10 Which are not the elementary particles?
A. Photons
B. Leptons
C. Hadrons
D. Quarks

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