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

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

Question # 2

1 amu is equal to

Question # 3

The unit of decay constant is:

Question # 4

How many isotopes of helium are present?

Question # 5

The rate of decay of radioactive substance

Question # 6

A pair of quark and antiquark makes a:

Question # 7

The number of isotopes of hydrogen are

Question # 8

Alfa particles are

Question # 9

A curie represents a very strong source of

Question # 10

Gamma rays consist of steam of

Question # 11

A particle having the mass of electron and charge of a proton is called a

Question # 12

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 # 13

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

Question # 14

The isotope/s of hydrogen is /are:

Question # 15

For Protium, the mass defect is:

Question # 16

The figure 1.007276μ shows the mass of an:

Question # 17

Mass of neutron is

Question # 18

Neutron was suggested to be in the nucleus by:

Question # 19

The rate of decay of a radioactive substance

Question # 20

γ-rays behave like a particle because they explain the

Question # 21

A mass spectrograph sort out

Question # 22

Which of the following material has longer half life

Question # 23

The nucleus/nuclei of hydrogen is/are:

Question # 24

Radioactivity was discovered by:

Question # 25

Rate of decay is actually described by.

Question # 26

Curie is a unit of

Question # 27

The half lie of radium-226 is

Question # 28

Heavy water is made of one oxygen atom and two atoms of:

Question # 29

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

Question # 30

The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains

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Sr.# Question Answer
1 γ-rays are
A. electrostatic waves
B. electromagnetic waves
C. heavy particles
D. longitudinal waves
2 A pair of quark and antiquark makes a:
A. Meson
B. Baryon
C. Proton
D. Neutron
3 The range of particle depends upon the factor
A. charge, mass and energy of particle
B. density of medium
C. ionization potential of the atoms
D. all the above
4 In wilson cloud chamber, the air becomes saturated with:
A. Alcohol vapours
B. Water
C. Helium gas
D. Nitrogen gas
5 Radium was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. Rutherford
6 If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be
A. Equal to 1
B. Less than 1
C. Greater than 1
D. Infinity
7 In 1932 Chadwick discovered
A. proton
B. neutron
C. photon
D. electron
8 Neutron was discovered in
A. 1915
B. 1920
C. 1925
D. 1932
9 The nuclei of an element having the same charge number but different mass numbers are called:
A. Isobars
B. Isotopes
C. Isomers
D. Isobaric
10 An alpha particle has a charge of
A. +2e
B. -2e
C. -e
D. +3e

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