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

The half lie of radium-226 is

Question # 5

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

Question # 6

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

Question # 7

Rutherford performed an experiment on nuclear reactions in:

Question # 8

The counter, which also provides the power to the G.M. tube is called:

Question # 9

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

Question # 10

Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called

Question # 11

Charge on neutron is

Question # 12

The number of isotopes of hydrogen are

Question # 13

Radioactivity was discovered by:

Question # 14

The number if neutrons in the nucleus of 92U235are

Question # 15

The chemical behaviour of an atom is determined by

Question # 16

Nuclei that have the same charge number but different mass number are called

Question # 17

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

Question # 18

The unit of decay constant is:

Question # 19

Pair production take place when energy ofγ-rays photon is

Question # 20

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

Question # 21

Electrons are

Question # 22

Nucleus consists of

Question # 23

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

Question # 24

For an atom having atomic number Z and atomic weight A, the number of electron in an atoms

Question # 25

Which are not the elementary particles?

Question # 26

Examples of moderators used in a fission reactor is/are:

Question # 27

Mass of proton is of order of

Question # 28

The range of particle depends upon the factor

Question # 29

The energy is found from Einstein's mass energy relation is called

Question # 30

The penetration power ofβ-particle is

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Curie is a unit of
A. reluctance
B. resistivity
C. binding energy
D. radioactivity
2 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
3 Electrons are
A. positive charged
B. negatively charged
C. massless
D. neutral
4 How many isotopes of helium are present?
A. 1
B. 2
C. 3
D. 4
5 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
6 Radioactivity
A. is exhibited more by semiconductors in general
B. in exhibited more by the element when they are coupled
C. with other radioactive elements by a covalent bond
D. is an atomic property of radioactive elements
7 Marie curie and Pierre curie discovered:
A. Uranium
B. Polonium
C. Radium
D. Both (A) and (C)
8 A mass spectrograph sort out
A. molecules
B. atoms
C. elements
D. isotopes
9 Rutherford performed an experiment on nuclear reactions in:
A. 1718 A.D
B. 1818 A.D
C. 1918 A.D
D. 2001 A.D.
10 When certain nucleus emits aβ-particles, is mass number:
A. Remain same
B. Increases by one
C. Decreases by one
D. Decreases by four

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