ECAT Pre General Science Physics Chapter 21 MCQ Test With Answer

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

Which are not the elementary particles?

Question # 2

Referring to the above figure, we can say that of all the elements, the most stable element is

Question # 3

The isotope/s of hydrogen is /are:

Question # 4

Binding energy per nucleus is

Question # 5

Neutron was discovered in

Question # 6

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

Question # 7

The energy is found from Einstein's mass energy relation is called

Question # 8

When certain nucleus emits anα particle, its mass number:

Question # 9

Phenomenon of radioactivity is due to disintegration of

Question # 10

The total charge of any nucleus is given as

Question # 11

How much time, theα-particle more massive than an electron

Question # 12

When a nucleus emits an alpha particles, its charge number decreases by

Question # 13

Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:

Question # 14

Different radioactive material have

Question # 15

The unit of decay constant is:

Question # 16

The number of isotopes of hydrogen are

Question # 17

Rutherford performed an experiment on nuclear reactions in:

Question # 18

Rate of decay is actually described by.

Question # 19

Pair production take place when energy ofγ-rays photon is

Question # 20

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 # 21

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

Question # 22

Marie curie and Pierre curie discovered:

Question # 23

How many isotopes of helium are present?

Question # 24

The chemical behaviour of an atom is determined by

Question # 25

There is present in paraffin a large amount of:

Question # 26

The range ofβ-particle in air is greater than that ofα-particle by

Question # 27

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

Question # 28

Structure of the nucleus was explained by

Question # 29

An alpha particle has a charge of

Question # 30

Neon gas have three isotopes whose atomic numbers are

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 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
2 In his experiment on nuclear reactions, Rutherford bombardedα particles on:
A. Nitrogen
B. Hydrogen
C. Lead
D. Oxygen
3 In radio-active decay, the original element which disintegrate to another element is called
A. element
B. daughter element
C. parent element
D. none of these
4 Beta particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
5 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
6 How many isotopes of helium are present?
A. 1
B. 2
C. 3
D. 4
7 Rutherford performed an experiment on nuclear reactions in:
A. 1718 A.D
B. 1818 A.D
C. 1918 A.D
D. 2001 A.D.
8 A mass difference of 0.0012 u is equivalent to and energy of:
A. 0.5 Me V
B. 1.13 MeV
C. 5.13 MeV
D. 1.13 keV
9 Gamma rays consist of steam of
A. electron
B. proton
C. photons
D. all of these
10 Nuclei that have the same charge number but different mass number are called
A. isotones
B. isomers
C. isotopes
D. isobars

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