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

Alfa , beta and gamma rays are emitted from a radio-active substance

Question # 2

The number of all the protons and neutrons in a nucleus is known as

Question # 3

Neutron was discovered in

Question # 4

Neutron was discovered by

Question # 5

In wilson cloud chamber, the air becomes saturated with:

Question # 6

When thorium nucleus emits aβ-particle, the daughter nucleus is called:

Question # 7

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

Question # 8

Which of the following material has longer half life

Question # 9

The number of isotopes of hydrogen are

Question # 10

γ-rays behave like a particle because they explain the

Question # 11

Nucleus of a hydrogen atom may contain:

Question # 12

The isotope/s of hydrogen is /are:

Question # 13

The number if neutrons in the nucleus of 92U235are

Question # 14

Rate of decay is actually described by.

Question # 15

Neon gas have three isotopes whose atomic numbers are

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Structure of the nucleus was explained by
A. J.J Thomson
B. Bohr
C. Millikan
D. Rutherford
2 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
3 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
4 The number of all the protons and neutrons in a nucleus is known as
A. atomic number
B. mass number
C. charge number
D. none of these
5 Heavy water is made of one oxygen atom and two atoms of:
A. Protium
B. Deuterium
C. Tritium
D. Any of these
6 Marie curie and Pierre curie discovered:
A. Uranium
B. Polonium
C. Radium
D. Both (A) and (C)
7 The amount of energy equivalent to 1 a.m.u is
A. 9.315 Mev
B. 93.15 Mev
C. 931.5 Mev
D. 2.22 Mev
8 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
9 Phenomenon of radioactivity is due to disintegration of
A. nucleus
B. neutron
C. proton
D. molecule
10 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

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