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

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

Question # 2

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

Question # 3

Rate of decay is actually described by.

Question # 4

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

Question # 5

In 1932 Chadwick discovered

Question # 6

The half lie of radium-226 is

Question # 7

Neon gas have three isotopes whose atomic numbers are

Question # 8

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

Question # 9

When certain nucleus emits anα particle, its mass number:

Question # 10

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

Question # 11

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

Question # 12

After alpha decay the atomic number of the atom

Question # 13

The isotope/s of hydrogen is /are:

Question # 14

Nucleus of a hydrogen atom may contain:

Question # 15

When certain nucleus emits aβ-particles, is mass number:

Question # 16

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

Question # 17

An alpha particle has a charge of

Question # 18

Three quarks make:

Question # 19

Radioactivity was discovered by:

Question # 20

Binding energy per nucleus is

Question # 21

The penetration power ofβ-particle is

Question # 22

The number of isotopes of hydrogen are

Question # 23

Electrons are

Question # 24

Different radioactive material have

Question # 25

The rate of decay of radioactive substance

Question # 26

Pair production take place when energy ofγ-rays photon is

Question # 27

The nuclei of an element having the same charge number but different mass numbers are called:

Question # 28

The diameter of an atom is of the order

Question # 29

Radioactivity is

Question # 30

Neutron was suggested to be in the nucleus by:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Binding energy per nucleus is
A. greater for heavy nucleus
B. least for heavy nucleus
C. greatest for light nuclei
D. decreases for medium weight niclei
2 The unit of decay constant is:
A. Second
B. Metre
C. Hour
D. Year
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 A mass difference of 0.0012 u is equivalent to and energy of:
A. 0.5 Me V
B. 1.13 MeV
C. 5.13 MeV
D. 1.13 keV
5 Nucleus of a hydrogen atom may contain:
A. One neutron only
B. Two protons and one neutron
C. Two protons and two neutrons
D. Aany of above
6 There is present in paraffin a large amount of:
A. Nitrogen
B. Hydrogen
C. Carbon
D. Baryllium
7 Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:
A. 50
B. 100
C. 150
D. 200
8 The missing mass which is converted to energy in the formation of nucleus, is called
A. packing fraction
B. mass defect
C. binding energy
D. none of these
9 The most abundant isotope of neon is
A. neon-20
B. neon-21
C. neon-22
D. neon-23
10 The range ofβ-particle in air is greater than that ofα-particle by
A. 1000 times
B. 100 times
C. 15 times
D. 10 times

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