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

In wilson cloud chamber, the air becomes saturated with:

Question # 2

The diameter of an atom is of the order

Question # 3

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

Question # 4

A pair of quark and antiquark makes a:

Question # 5

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

Question # 6

Beta particles are

Question # 7

For an atom having atomic number Z and atomic weight A, the number of electron in an atoms

Question # 8

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

Question # 9

Neutron was suggested to be in the nucleus by:

Question # 10

An alpha particle has a charge of

Question # 11

Binding energy per nucleus is

Question # 12

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

Question # 13

How many isotopes of helium are present?

Question # 14

Which of the following material has longer half life

Question # 15

There is present in paraffin a large amount of:

Question # 16

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

Question # 17

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

Question # 18

Electrons are

Question # 19

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

Question # 20

The chemical behaviour of an atom is determined by

Question # 21

The penetration power ofβ-particle is

Question # 22

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

Question # 23

Radioactivity was discovered by

Question # 24

Pair production take place when energy ofγ-rays photon is

Question # 25

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

Question # 26

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

Question # 27

Radioactivity is

Question # 28

Mass of proton is

Question # 29

The most abundant isotope of neon is

Question # 30

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The energy acquired by a mass of 1g moving with the speed of light is
A. 3 x 108J
B. 9 x 1013J
C. 3 x 1013J
D. 9 x 1016J
2 The nuclei of an element having the same charge number but different mass numbers are called:
A. Isobars
B. Isotopes
C. Isomers
D. Isobaric
3 The unit of decay constant is
A. sex
B. sec2
C. sec-1
D. sec-2
4 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
5 Referring to the above figure, we can say that of all the elements, the most stable element is
A. Phosphours
B. Iron
C. uranium
D. Lithium
6 In radioactive decay, the new element which is formed due to the disintegration of original element is called
A. element
B. daughter element
C. parent element
D. none of these
7 The number of all the protons and neutrons in a nucleus is known as
A. atomic number
B. mass number
C. charge number
D. none of these
8 When radioactive nucleus emits aβ-particle, the proton-neutron ratio
A. decrease
B. increase
C. same
D. none of these
9 The number of protons inside a nucleus is called
A. mass number
B. atomic weight
C. atomic number
D. none of these
10 An alpha particle has a charge of
A. +2e
B. -2e
C. -e
D. +3e

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