ECAT Pre General Science Physics Chapter 21 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 21 Nuclear Physics

Try The 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

Different radioactive material have

Question # 2

γ-rays are

Question # 3

Radioactivity is

Question # 4

Rate of decay is actually described by.

Question # 5

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

Question # 6

Rutherford performed an experiment on nuclear reactions in:

Question # 7

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

Question # 8

Nucleus of a hydrogen atom may contain:

Question # 9

When certain nucleus emits aβ-particles, is mass number:

Question # 10

The diameter of an atom is of the order

Question # 11

According to Rutherford atomic model, the positive charge in an atom

Question # 12

The emission of radiations take place in elements, having charge number greater than

Question # 13

1 amu is equal to

Question # 14

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

Question # 15

Proton was discovered by Rutherford in

Question # 16

Radiation detector are used to

Question # 17

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

Question # 18

The half life of uranium-238 is

Question # 19

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

Question # 20

The number of isotopes of hydrogen are

Question # 21

The total charge of any nucleus is given as

Question # 22

For Protium, the mass defect is:

Question # 23

The unit of decay constant is:

Question # 24

The half lie of radium-226 is

Question # 25

In 1932 Chadwick discovered

Question # 26

The number if neutrons in the nucleus of 92U235are

Question # 27

The nuclei of an element having the same charge number but different mass numbers are called:

Question # 28

Neutron was suggested to be in the nucleus by:

Question # 29

The chemical properties of all the isotopes of an elements are

Question # 30

Mass of proton is of order of

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 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
2 When a nucleus emits an alpha particles, its charge number decreases by
A. 3
B. 2
C. 6
D. 5
3 Radioactivity was discovered by
A. Rutherford
B. Henri Becqureal
C. Maxwell
D. James Chadwick
4 The chemical properties of all the isotopes of an elements are
A. same
B. different
C. slightly different
D. none of these
5 Marie curie and Pierre curie discovered:
A. Uranium
B. Polonium
C. Radium
D. Both (A) and (C)
6 The rate of decay of radioactive substance
A. is constant
B. decrease exponentially with time
C. varies inversely as time
D. decreases linearly with time
7 If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by
A. -4
B. 4
C. 2
D. 1
8 Nucleus of a hydrogen atom may contain:
A. One neutron only
B. Two protons and one neutron
C. Two protons and two neutrons
D. Aany of above
9 How much time, theα-particle more massive than an electron
A. 600
B. 7000
C. 5000
D. 15000
10 The number of isotopes of hydrogen are
A. 2
B. 1
C. 3
D. 4

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