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

Mass of proton is

Question # 2

The range of particle depends upon the factor

Question # 3

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

Question # 4

Which of the following material has smaller has life

Question # 5

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

Question # 6

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

Question # 7

The isotope/s of hydrogen is /are:

Question # 8

Neutron was suggested to be in the nucleus by:

Question # 9

The mass of the nucleus is always less than the total man of the protons and neutron that make up the nucleus. The difference of the two masses is called

Question # 10

γ-rays behave like a particle because they explain the

Question # 11

When radioactive nucleus emits aβ-particle, the proton-neutron ratio

Question # 12

Nucleon means:

Question # 13

Beta particles are

Question # 14

Nuclei that have the same charge number but different mass number are called

Question # 15

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

Question # 16

Radioactivity was discovered by:

Question # 17

In wilson cloud chamber, the air becomes saturated with:

Question # 18

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

Question # 19

The total charge of any nucleus is given as

Question # 20

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

Question # 21

A mass spectrograph sort out

Question # 22

Rate of decay is actually described by.

Question # 23

Structure of the nucleus was explained by

Question # 24

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

Question # 25

Neon gas have three isotopes whose atomic numbers are

Question # 26

Binding energy per nucleus is

Question # 27

Neutron was discovered by

Question # 28

A curie represents a very strong source of

Question # 29

Radioactivity was discovered by

Question # 30

The penetration power ofβ-particle is

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 When radioactive nucleus emits aβ-particle, the proton-neutron ratio
A. decrease
B. increase
C. same
D. none of these
2 Rutherford performed an experiment on nuclear reactions in:
A. 1718 A.D
B. 1818 A.D
C. 1918 A.D
D. 2001 A.D.
3 The number if neutrons in the nucleus of 92U235are
A. Infinite
B. 92
C. 235
D. 143
4 Pair production take place when energy ofγ-rays photon is
A. equal to 1.02 Mev-
B. greater than 1.02 Mev
C. less than 1.02 Mev
D. none of these
5 Neutrons are
A. positive charge
B. negatively charged
C. massless
D. neutral
6 The total charge of any nucleus is given as
A. Ze2
B. Z2e
C. Z/e
D. Ze
7 The emission of radiations take place in elements, having charge number greater than
A. 109
B. 82
C. 69
D. 52
8 The nucleus left after the emission of some radiation is called:
A. Parent nucleus
B. Daughter necleus
C. Mother necleus
D. Any of these
9 Nucleon means:
A. Only electrons
B. Only neutrons
C. Only protons
D. Both (A ) and (C)
10 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

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