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

00:00
Question # 1

Electrons are

Question # 2

Mass of proton is

Question # 3

Nucleon means:

Question # 4

U-238 present in the natural uranium is about:

Question # 5

Radium was discovered by:

Question # 6

Rutherford performed an experiment on nuclear reactions in:

Question # 7

A mass spectrograph sort out

Question # 8

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

Question # 9

Nucleus of a hydrogen atom may contain:

Question # 10

Marie curie and Pierre curie discovered:

Question # 11

Radioactivity was discovered by:

Question # 12

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

Question # 13

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

Question # 14

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

Question # 15

The penetration power ofβ-particle is

Question # 16

When radioactive nucleus emits aβ-particle, the proton-neutron ratio

Question # 17

The energy acquired by a mass of 1g moving with the speed of light is

Question # 18

How many isotopes of helium are present?

Question # 19

Which of the following material has longer half life

Question # 20

γ-rays are

Question # 21

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

Question # 22

β-particles are easily deflected by collisions than heavy

Question # 23

The number of protons inside a nucleus is called

Question # 24

The number of isotopes of hydrogen are

Question # 25

The nucleus left after the emission of some radiation is called:

Question # 26

Which are not the elementary particles?

Question # 27

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

Question # 28

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

Question # 29

Nucleus consists of

Question # 30

The number if neutrons in the nucleus of 92U235are

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The diameter of an atom is of the order
A. 10-125m
B. 10-11m
C. 10-10m
D. 10-9m
2 Curie is a unit of
A. reluctance
B. resistivity
C. binding energy
D. radioactivity
3 Mass of proton is
A. 1.67 x 10-27kg
B. 1.67 x 10-31kg
C. 1.66 x 10-34kg
D. 1.67 x 10-17kg
4 A particle having the mass of electron and charge of a proton is called a
A. photon
B. position
C. antiproton
D. antineutrino
5 In his experiment on nuclear reactions, Rutherford bombardedα particles on:
A. Nitrogen
B. Hydrogen
C. Lead
D. Oxygen
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 Beta particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
8 A pair of quark and antiquark makes a:
A. Meson
B. Baryon
C. Proton
D. Neutron
9 The chemical behaviour of an atom is determined by
A. binding energy
B. atomic number
C. mass number
D. number of isotopes
10 Proton was discovered by Rutherford in
A. 1915
B. 1906
C. 1910
D. 1920

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