ECAT Pre General Science Physics Chapter 21 MCQ Test With Answer

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

Neutron was discovered by

Question # 2

Radioactivity

Question # 3

In radioactive decay, the new element which is formed due to the disintegration of original element is called

Question # 4

Structure of the nucleus was explained by

Question # 5

1 amu is equal to

Question # 6

Charge on proton is

Question # 7

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

Question # 8

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

Question # 9

When a charged particle passes through matter, it produces ionization, this effect is used in

Question # 10

β-particles are easily deflected by collisions than heavy

Question # 11

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

Question # 12

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

Question # 13

Nucleon means:

Question # 14

Pair production take place when energy ofγ-rays photon is

Question # 15

The rate of decay of a radioactive substance

Question # 16

U-238 present in the natural uranium is about:

Question # 17

The unit of decay constant is:

Question # 18

Proton was discovered by Rutherford in

Question # 19

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

Question # 20

The range of particle depends upon the factor

Question # 21

The rate of decay of radioactive substance

Question # 22

The mass of the nucleus is always less than the total man of the protons and neutron that make up the nucleus. The difference of the two masses is called

Question # 23

A curie represents a very strong source of

Question # 24

Neutron was suggested to be in the nucleus by:

Question # 25

Mass of proton is of order of

Question # 26

The amount of energy equivalent to 1 a.m.u is

Question # 27

Radioactivity was discovered by

Question # 28

Gamma rays consist of steam of

Question # 29

Rutherford performed an experiment on nuclear reactions in:

Question # 30

Marie curie and Pierre curie discovered:

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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 number of protons inside a nucleus is called
A. mass number
B. atomic weight
C. atomic number
D. none of these
3 During the nuclear changes, the law/s of conservation that hold/s are that of:
A. Charge
B. energy
C. Momentum
D. Mass
4 Marie curie and Pierre curie discovered:
A. Uranium
B. Polonium
C. Radium
D. Both (A) and (C)
5 Which of these is not a radiation detector
A. Wilson cloud chamber
B. cyclotron acceleration
C. Geiger Miller counter
D. solid state detector
6 The penetration power ofβ-particle is
A. zero
B. less thanα-particle
C. equal toα-particle
D. greater thanα-particle
7 The chemical behaviour of an atom is determined by
A. binding energy
B. atomic number
C. mass number
D. number of isotopes
8 The nucleus left after the emission of some radiation is called:
A. Parent nucleus
B. Daughter necleus
C. Mother necleus
D. Any of these
9 Nucleon means:
A. Only electrons
B. Only neutrons
C. Only protons
D. Both (A ) and (C)
10 For Protium, the mass defect is:
A. Infinite
B. Zero
C. Very large
D. A few grams

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