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

Nucleon means:

Question # 2

Radiation detector are used to

Question # 3

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

Question # 4

A mass difference of 0.0012 u is equivalent to and energy of:

Question # 5

The most abundant isotope of neon is

Question # 6

During the nuclear changes, the law/s of conservation that hold/s are that of:

Question # 7

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

Question # 8

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

Question # 9

γ-rays are

Question # 10

The number of isotopes of hydrogen are

Question # 11

Mass of proton is of order of

Question # 12

Binding energy per nucleus is

Question # 13

The rate of decay of radioactive substance

Question # 14

Which of the following material has longer half life

Question # 15

1 amu is equal to.

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 In wilson cloud chamber, the air becomes saturated with:
A. Alcohol vapours
B. Water
C. Helium gas
D. Nitrogen gas
2 The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains
A. 3 more neutrons
B. 3 more electrons
C. 3 more protons
D. 3 more ions
3 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
4 Radioactivity was discovered by
A. Rutherford
B. Henri Becqureal
C. Maxwell
D. James Chadwick
5 During the nuclear changes, the law/s of conservation that hold/s are that of:
A. Charge
B. energy
C. Momentum
D. Mass
6 Nucleon means:
A. Only electrons
B. Only neutrons
C. Only protons
D. Both (A ) and (C)
7 γ-rays behave like a particle because they explain the
A. Compton effect
B. Photoelectric effect
C. Pair-production
D. all the above
8 The chemical behaviour of an atom is determined by
A. binding energy
B. atomic number
C. mass number
D. number of isotopes
9 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
10 Three quarks make:
A. An electron
B. A meson
C. A baryon
D. A photon

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