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

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

Question # 2

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

Question # 3

Fraction of the decaying atoms per unit time is called

Question # 4

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

Question # 5

The chemical behaviour of an atom is determined by

Question # 6

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

Question # 7

In 1932 Chadwick discovered

Question # 8

A mass spectrograph sort out

Question # 9

In wilson cloud chamber, the air becomes saturated with:

Question # 10

Phenomenon of radioactivity is due to disintegration of

Question # 11

The most abundant isotope of neon is

Question # 12

Pair production take place when energy ofγ-rays photon is

Question # 13

Radium was discovered by:

Question # 14

Marie curie and Pierre curie discovered:

Question # 15

The half life of radioactive substances depends upon

Question # 16

The number of all the protons and neutrons in a nucleus is known as

Question # 17

γ-rays are

Question # 18

The rate of decay of radioactive substance

Question # 19

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

Question # 20

The half life of uranium-238 is

Question # 21

The number of protons inside a nucleus is called

Question # 22

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

Question # 23

According to Rutherford atomic model, the positive charge in an atom

Question # 24

The unit of decay constant is:

Question # 25

Gamma rays consist of steam of

Question # 26

The half lie of radium-226 is

Question # 27

Which of these is not a radiation detector

Question # 28

Nucleus of a hydrogen atom may contain:

Question # 29

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

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 Beta particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
2 The isotope/s of hydrogen is /are:
A. Protium
B. Deuterium
C. Tritium
D. Both (A) and (B)
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 Neon gas have three isotopes whose atomic numbers are
A. 20, 24 , 23
B. 20, 21 , 22
C. 20, 19 , 21
D. none of these
5 Neutron was discovered in
A. 1915
B. 1920
C. 1925
D. 1932
6 Gamma rays consist of steam of
A. electron
B. proton
C. photons
D. all of these
7 In his experiment on nuclear reactions, Rutherford bombardedα particles on:
A. Nitrogen
B. Hydrogen
C. Lead
D. Oxygen
8 A mass spectrograph sort out
A. molecules
B. atoms
C. elements
D. isotopes
9 There is present in paraffin a large amount of:
A. Nitrogen
B. Hydrogen
C. Carbon
D. Baryllium
10 Radioactivity was discovered by
A. Rutherford
B. Henri Becqureal
C. Maxwell
D. James Chadwick

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