ECAT Pre Computer Science Chapter 21 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 21 Nuclear Physics

Try The MCQ's Test For ECAT Physics Chapter 21 Nuclear Physics

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ECAT Physics Chapter 21 Nuclear Physics

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Question # 1

Heavy water is made of one oxygen atom and two atoms of:

Question # 2

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

Question # 3

After alpha decay the atomic number of the atom

Question # 4

Electrons are

Question # 5

Gamma rays consist of steam of

Question # 6

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

Question # 7

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

Question # 8

Proton was discovered by Rutherford in

Question # 9

Neutron was suggested to be in the nucleus by:

Question # 10

Neutron was disvovered by:

Question # 11

Rutherford performed an experiment on nuclear reactions in:

Question # 12

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

Question # 13

Alfa particles are

Question # 14

In his experiment on nuclear reactions, Rutherford bombardedα particles on:

Question # 15

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Neon gas have three isotopes whose atomic numbers are
A. 20, 24 , 23
B. 20, 21 , 22
C. 20, 19 , 21
D. none of these
2 A pair of quark and antiquark makes a:
A. Meson
B. Baryon
C. Proton
D. Neutron
3 In 1932 Chadwick discovered
A. proton
B. neutron
C. photon
D. electron
4 Phenomenon of radioactivity is due to disintegration of
A. nucleus
B. neutron
C. proton
D. molecule
5 The penetration power ofβ-particle is
A. zero
B. less thanα-particle
C. equal toα-particle
D. greater thanα-particle
6 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
7 Neutron was discovered in
A. 1915
B. 1920
C. 1925
D. 1932
8 The counter, which also provides the power to the G.M. tube is called:
A. Thin mica window
B. thin glass window
C. Airy window
D. Wooden window
9 γ-rays behave like a particle because they explain the
A. Compton effect
B. Photoelectric effect
C. Pair-production
D. all the above
10 Charge on proton is
A. 1.59 x 10-9C
B. 1.59 x 10-7C
C. -1.59 x 10-19 C
D. 1.59 x 10-19C

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