ECAT Pre Computer Science Chapter 21 MCQ Test With Answer

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

γ-rays are

Question # 2

Which of the following material has longer half life

Question # 3

Proton was discovered by Rutherford in

Question # 4

The most abundant isotope of neon is

Question # 5

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

Question # 6

Gamma rays consist of steam of

Question # 7

Binding energy per nucleus is

Question # 8

Different radioactive material have

Question # 9

Alfa particles are

Question # 10

β-particles are easily deflected by collisions than heavy

Question # 11

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

Question # 12

The unit of decay constant is

Question # 13

U-238 present in the natural uranium is about:

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 In his experiment on nuclear reactions, Rutherford bombardedα particles on:
A. Nitrogen
B. Hydrogen
C. Lead
D. Oxygen
2 Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called
A. deuteron
B. deterium
C. protium
D. tritium
3 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
4 U-238 present in the natural uranium is about:
A. 59%
B. 0.007%
C. 99%
D. 39%
5 For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is
A. A - Z
B. A
C. Z
D. A + Z
6 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
7 Examples of moderators used in a fission reactor is/are:
A. Water
B. Heavy water
C. Carbon
D. Hydrocarbon
8 The isotope/s of hydrogen is /are:
A. Protium
B. Deuterium
C. Tritium
D. Both (A) and (B)
9 When certain nucleus emits aβ-particles, is mass number:
A. Remain same
B. Increases by one
C. Decreases by one
D. Decreases by four
10 The range of particle depends upon the factor
A. charge, mass and energy of particle
B. density of medium
C. ionization potential of the atoms
D. all the above

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