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

The reciprocal of decay constant λ of a radioactive material is:

Question # 2

Rutherford performed an experiment on nuclear reactions in:

Question # 3

Radium was discovered by:

Question # 4

When certain nucleus emits anα particle, its mass number:

Question # 5

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

Question # 6

A mass spectrograph sort out

Question # 7

Mass of neutron is

Question # 8

γ-rays behave like a particle because they explain the

Question # 9

Mass of proton is of order of

Question # 10

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

Question # 11

The emission of radiations take place in elements, having charge number greater than

Question # 12

Binding energy per nucleus is

Question # 13

The half life of uranium-238 is

Question # 14

Radioactivity was discovered by

Question # 15

The rate of decay of a radioactive substance

Question # 16

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

Question # 17

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

Question # 18

There is present in paraffin a large amount of:

Question # 19

Which are not the elementary particles?

Question # 20

In wilson cloud chamber, the air becomes saturated with:

Question # 21

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

Question # 22

When thorium nucleus emits aβ-particle, the daughter nucleus is called:

Question # 23

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

Question # 24

For Protium, the mass defect is:

Question # 25

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

Question # 26

Three quarks make:

Question # 27

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

Question # 28

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

Question # 29

The range of particle depends upon the factor

Question # 30

A pair of quark and antiquark makes a:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 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
2 Electrons are
A. positive charged
B. negatively charged
C. massless
D. neutral
3 Neutron was suggested to be in the nucleus by:
A. Rutherford in 1920
B. Bohar in 1913
C. Dirac in 1928
D. Anderson in 1932
4 A mass spectrograph sort out
A. molecules
B. atoms
C. elements
D. isotopes
5 Hydrogen atom with only one proton and one neutron in its nucleus, and one electron, is called
A. deuterium
B. protium
C. tritium
D. none of these
6 In wilson cloud chamber, the air becomes saturated with:
A. Alcohol vapours
B. Water
C. Helium gas
D. Nitrogen gas
7 Proton was discovered by Rutherford in
A. 1915
B. 1906
C. 1910
D. 1920
8 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
9 Beta particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
10 For an atom having atomic number Z and atomic weight A, the charge on the nucleus is
A. A - Z
B. A + Z
C. Z
D. A

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