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

The half life of uranium-238 is

Question # 2

Neutron was discovered by

Question # 3

Which are not the elementary particles?

Question # 4

A curie represents a very strong source of

Question # 5

Fraction of the decaying atoms per unit time is called

Question # 6

Phenomenon of radioactivity is due to disintegration of

Question # 7

The diameter of an atom is of the order

Question # 8

The penetration power ofβ-particle is

Question # 9

A mass spectrograph sort out

Question # 10

In 1932 Chadwick discovered

Question # 11

The half lie of radium-226 is

Question # 12

Neon gas have three isotopes whose atomic numbers are

Question # 13

The number if neutrons in the nucleus of 92U235are

Question # 14

Which of the following material has longer half life

Question # 15

Charge on proton is

Question # 16

Marie curie and Pierre curie discovered:

Question # 17

If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be

Question # 18

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

Question # 19

Neutrons are

Question # 20

Radioactivity was discovered by

Question # 21

The nucleus/nuclei of hydrogen is/are:

Question # 22

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

Question # 23

Alfa , beta and gamma rays are emitted from a radio-active substance

Question # 24

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

Question # 25

1 amu is equal to

Question # 26

Rutherford performed an experiment on nuclear reactions in:

Question # 27

Charge on neutron is

Question # 28

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

Question # 29

Three quarks make:

Question # 30

β-particles are easily deflected by collisions than heavy

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 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
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 chemical behaviour of an atom is determined by
A. binding energy
B. atomic number
C. mass number
D. number of isotopes
4 When certain nucleus emits anα particle, its mass number:
A. Increases by one
B. Decreases by one
C. Remain same
D. Decreases by four
5 Beta particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
6 A pair of quark and antiquark makes a:
A. Meson
B. Baryon
C. Proton
D. Neutron
7 After alpha decay the atomic number of the atom
A. increase by four
B. decreases by two
C. increases by two
D. decrease by four
8 Hydrogen atom with only one proton and one neutron in its nucleus, and one electron, is called
A. deuterium
B. protium
C. tritium
D. none of these
9 When a nucleus emits an alpha particle, it atomic mass decreased by
A. 2
B. 1
C. 4
D. 3
10 Radiation detector are used to
A. measure intensity of radiation
B. measure energy of radiation
C. difference between different types of radiation
D. all the above

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