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

A curie represents a very strong source of

Question # 2

The range of particle depends upon the factor

Question # 3

Charge on neutron is

Question # 4

The half lie of radium-226 is

Question # 5

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

Question # 6

Curie is a unit of

Question # 7

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

Question # 8

The penetration power ofβ-particle is

Question # 9

When certain nucleus emits anα particle, its mass number:

Question # 10

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

Question # 11

Fraction of the decaying atoms per unit time is called

Question # 12

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

Question # 13

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

Question # 14

U-238 present in the natural uranium is about:

Question # 15

Charge on proton is

Question # 16

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

Question # 17

Rutherford performed an experiment on nuclear reactions in:

Question # 18

The unit of decay constant is

Question # 19

Which of the following material has longer half life

Question # 20

The missing mass which is converted to energy in the formation of nucleus, is called

Question # 21

In 1932 Chadwick discovered

Question # 22

Which are not the elementary particles?

Question # 23

Phenomenon of radioactivity is due to disintegration of

Question # 24

β-particles are easily deflected by collisions than heavy

Question # 25

Alfa particles are

Question # 26

Mass of neutron is

Question # 27

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

Question # 28

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

Question # 29

1 amu is equal to

Question # 30

The rate of decay of a radioactive substance

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Examples of moderators used in a fission reactor is/are:
A. Water
B. Heavy water
C. Carbon
D. Hydrocarbon
2 The chemical properties of all the isotopes of an elements are
A. same
B. different
C. slightly different
D. none of these
3 There is present in paraffin a large amount of:
A. Nitrogen
B. Hydrogen
C. Carbon
D. Baryllium
4 The missing mass which is converted to energy in the formation of nucleus, is called
A. packing fraction
B. mass defect
C. binding energy
D. none of these
5 The nuclei of an element having the same charge number but different mass numbers are called:
A. Isobars
B. Isotopes
C. Isomers
D. Isobaric
6 The diameter of an atom is of the order
A. 10-125m
B. 10-11m
C. 10-10m
D. 10-9m
7 Neutron was disvovered by:
A. Rutherford in 1920
B. Chadwick in 1922
C. Bohr in 1913
D. Compton in 1927
8 The nucleus/nuclei of hydrogen is/are:
A. Proton
B. Deuteron
C. Triton
D. All of these
9 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
10 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

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