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

Phenomenon of radioactivity is due to disintegration of

Question # 2

Electrons are

Question # 3

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

Question # 4

Pair production take place when energy ofγ-rays photon is

Question # 5

The time required for a radioactive material to decrease in active by one half is called

Question # 6

A curie represents a very strong source of

Question # 7

How many isotopes of helium are present?

Question # 8

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

Question # 9

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

Question # 10

A pair of quark and antiquark makes a:

Question # 11

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

Question # 12

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

Question # 13

Neutron was suggested to be in the nucleus by:

Question # 14

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

Question # 15

Rutherford performed an experiment on nuclear reactions in:

Question # 16

Rate of decay is actually described by.

Question # 17

The range of particle depends upon the factor

Question # 18

The chemical behaviour of an atom is determined by

Question # 19

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 # 20

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

Question # 21

Radiation detector are used to

Question # 22

A mass spectrograph sort out

Question # 23

The amount of energy equivalent to 1 a.m.u is

Question # 24

The chemical properties of all the isotopes of an elements are

Question # 25

Neutron was disvovered by:

Question # 26

Neutron was discovered in

Question # 27

Curie is a unit of

Question # 28

When a charged particle passes through matter, it produces ionization, this effect is used in

Question # 29

Nucleon means:

Question # 30

The diameter of an atom is of the order

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is
A. A - Z
B. A
C. Z
D. A + Z
2 Rutherford performed an experiment on nuclear reactions in:
A. 1718 A.D
B. 1818 A.D
C. 1918 A.D
D. 2001 A.D.
3 The penetration power ofβ-particle is
A. zero
B. less thanα-particle
C. equal toα-particle
D. greater thanα-particle
4 Binding energy per nucleus is
A. greater for heavy nucleus
B. least for heavy nucleus
C. greatest for light nuclei
D. decreases for medium weight niclei
5 Neutron was discovered in
A. 1915
B. 1920
C. 1925
D. 1932
6 Fraction of the decaying atoms per unit time is called
A. decay atom
B. decay element
C. decay constant
D. decay
7 When a charged particle passes through matter, it produces ionization, this effect is used in
A. fission reaction
B. reactor
C. radiation detector
D. fusion reaction
8 If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by
A. -4
B. 4
C. 2
D. 1
9 The figure 1.007276μ shows the mass of an:
A. Atom
B. Positron
C. Electron
D. Neutron
10 A curie represents a very strong source of
A. α-particle
B. β-particle
C. γ-particle
D. none of these

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