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

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

Question # 2

For an atom having atomic number Z and atomic weight A, the charge on the nucleus is

Question # 3

Phenomenon of radioactivity is due to disintegration of

Question # 4

The amount of energy equivalent to 1 a.m.u is

Question # 5

If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by

Question # 6

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

Question # 7

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

Question # 8

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

Question # 9

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

Question # 10

The penetration power ofβ-particle is

Question # 11

The number if neutrons in the nucleus of 92U235are

Question # 12

The figure 1.007276μ shows the mass of an:

Question # 13

The number of isotopes of hydrogen are

Question # 14

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

Question # 15

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

Question # 16

How much time, theα-particle more massive than an electron

Question # 17

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

Question # 18

Gamma rays consist of steam of

Question # 19

Radioactivity

Question # 20

Electrons are

Question # 21

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

Question # 22

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

Question # 23

1 amu is equal to

Question # 24

A pair of quark and antiquark makes a:

Question # 25

Curie is a unit of

Question # 26

Neutrons are

Question # 27

The range ofβ-particle in air is greater than that ofα-particle by

Question # 28

Neutron was discovered by

Question # 29

The rate of decay of a radioactive substance

Question # 30

Referring to the above figure, we can say that of all the elements, the most stable element is

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 In his experiment on nuclear reactions, Rutherford bombardedα particles on:
A. Nitrogen
B. Hydrogen
C. Lead
D. Oxygen
2 The number of protons inside a nucleus is called
A. mass number
B. atomic weight
C. atomic number
D. none of these
3 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
4 Fraction of the decaying atoms per unit time is called
A. decay atom
B. decay element
C. decay constant
D. decay
5 The chemical properties of an element depends upon the number of
A. electron
B. position
C. photons
D. neutrons
6 Which are not the elementary particles?
A. Photons
B. Leptons
C. Hadrons
D. Quarks
7 Alfa particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
8 The chemical behaviour of an atom is determined by
A. binding energy
B. atomic number
C. mass number
D. number of isotopes
9 Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:
A. 50
B. 100
C. 150
D. 200
10 The half life of uranium-238 is
A. 6.2 x 109years
B. 4.5 x 109days
C. 4.5 x 109years
D. 1.3 x 106years

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