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

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

Question # 2

The chemical behaviour of an atom is determined by

Question # 3

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

Question # 4

The chemical properties of all the isotopes of an elements are

Question # 5

The half lie of radium-226 is

Question # 6

Different radioactive material have

Question # 7

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

Question # 8

The isotope/s of hydrogen is /are:

Question # 9

Alfa , beta and gamma rays are emitted from a radio-active substance

Question # 10

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

Question # 11

The range of particle depends upon the factor

Question # 12

Binding energy per nucleus is

Question # 13

The number if neutrons in the nucleus of 92U235are

Question # 14

An alpha particle has a charge of

Question # 15

Which of the following material has longer half life

Question # 16

The figure 1.007276μ shows the mass of an:

Question # 17

If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by

Question # 18

Structure of the nucleus was explained by

Question # 19

Which of these is not a radiation detector

Question # 20

After alpha decay the atomic number of the atom

Question # 21

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

Question # 22

There is present in paraffin a large amount of:

Question # 23

In wilson cloud chamber, the air becomes saturated with:

Question # 24

Pair production take place when energy ofγ-rays photon is

Question # 25

A curie represents a very strong source of

Question # 26

Neutron was discovered in

Question # 27

Alfa particles are

Question # 28

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

Question # 29

Radioactivity was discovered by

Question # 30

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The isotope/s of hydrogen is /are:
A. Protium
B. Deuterium
C. Tritium
D. Both (A) and (B)
2 The chemical properties of all the isotopes of an elements are
A. same
B. different
C. slightly different
D. none of these
3 According to Rutherford atomic model, the positive charge in an atom
A. is concentrated at its centre
B. is in the form of positive electron at same distance from its centre
C. is spread uniformly through its volume
D. none of these
4 Proton was discovered by Rutherford in
A. 1915
B. 1906
C. 1910
D. 1920
5 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
6 The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains
A. 3 more neutrons
B. 3 more electrons
C. 3 more protons
D. 3 more ions
7 Radioactivity is
A. self disruptive activity
B. spontaneous activity
C. exhibited by all elements under proper conditions
D. both 'a' and 'b'
8 When a nucleus emits an alpha particles, its charge number decreases by
A. 3
B. 2
C. 6
D. 5
9 The emission of radiations take place in elements, having charge number greater than
A. 109
B. 82
C. 69
D. 52
10 In wilson cloud chamber, the air becomes saturated with:
A. Alcohol vapours
B. Water
C. Helium gas
D. Nitrogen gas

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