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

Phenomenon of radioactivity is due to disintegration of

Question # 2

γ-rays are

Question # 3

In 1932 Chadwick discovered

Question # 4

For an atom having atomic number Z and atomic weight A, the number of electron in an atoms

Question # 5

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

Question # 6

Which of the following material has longer half life

Question # 7

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

Question # 8

An alpha particle has a charge of

Question # 9

The unit of decay constant is

Question # 10

Radioactivity was discovered by

Question # 11

Which of these is not a radiation detector

Question # 12

The penetration power ofβ-particle is

Question # 13

Gamma rays consist of steam of

Question # 14

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

Question # 15

Three quarks make:

Question # 16

For Protium, the mass defect is:

Question # 17

U-238 present in the natural uranium is about:

Question # 18

Structure of the nucleus was explained by

Question # 19

Radioactivity is

Question # 20

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

Question # 21

Neon gas have three isotopes whose atomic numbers are

Question # 22

Charge on neutron is

Question # 23

The half life of uranium-238 is

Question # 24

Mass of neutron is

Question # 25

Which are not the elementary particles?

Question # 26

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

Question # 27

The most abundant isotope of neon is

Question # 28

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

Question # 29

Nucleus consists of

Question # 30

The number if neutrons in the nucleus of 92U235are

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Nucleon means:
A. Only electrons
B. Only neutrons
C. Only protons
D. Both (A ) and (C)
2 The number of isotopes of hydrogen are
A. 2
B. 1
C. 3
D. 4
3 In wilson cloud chamber, the air becomes saturated with:
A. Alcohol vapours
B. Water
C. Helium gas
D. Nitrogen gas
4 Radioactivity was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. All of them
5 Which of the following material has smaller has life
A. uranium
B. polonium
C. radium
D. radian
6 Marie curie and Pierre curie discovered:
A. Uranium
B. Polonium
C. Radium
D. Both (A) and (C)
7 Rutherford performed an experiment on nuclear reactions in:
A. 1718 A.D
B. 1818 A.D
C. 1918 A.D
D. 2001 A.D.
8 Nucleus consists of
A. proton and neutron
B. protons and electron
C. electron and neutron
D. protons only
9 The chemical properties of an element depends upon the number of
A. electron
B. position
C. photons
D. neutrons
10 The rate of decay of a radioactive substance
A. decrease exponentially with time
B. decreases linearly with time
C. increases linearly with time
D. increases exponentially with time

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