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

Binding energy per nucleus is

Question # 2

Nucleon means:

Question # 3

Charge on neutron is

Question # 4

The unit of decay constant is

Question # 5

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

Question # 6

Which are not the elementary particles?

Question # 7

The nucleus left after the emission of some radiation is called:

Question # 8

Neon gas have three isotopes whose atomic numbers are

Question # 9

The figure 1.007276μ shows the mass of an:

Question # 10

The penetration power ofβ-particle is

Question # 11

Neutron was discovered in

Question # 12

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

Question # 13

The half life of uranium-238 is

Question # 14

Radiation detector are used to

Question # 15

Pair production take place when energy ofγ-rays photon is

Question # 16

Maric Curie and Pieree Curie discovered two new radioactive elements, which are called

Question # 17

There is present in paraffin a large amount of:

Question # 18

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

Question # 19

Which of the following material has smaller has life

Question # 20

The number if neutrons in the nucleus of 92U235are

Question # 21

Radium was discovered by:

Question # 22

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

Question # 23

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

Question # 24

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

Question # 25

Nucleus consists of

Question # 26

Nuclei that have the same charge number but different mass number are called

Question # 27

The emission of radiations take place in elements, having charge number greater than

Question # 28

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

Question # 29

Heavy water is made of one oxygen atom and two atoms of:

Question # 30

The total charge of any nucleus is given as

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 When certain nucleus emits anα particle, its mass number:
A. Increases by one
B. Decreases by one
C. Remain same
D. Decreases by four
2 1 amu is equal to
A. 1.66 x 10-24kg
B. 1.66 x 10-19kg
C. 1.66 x 10-34kg
D. 1.66 x 10-27kg
3 Nucleon means:
A. Only electrons
B. Only neutrons
C. Only protons
D. Both (A ) and (C)
4 The nucleus/nuclei of hydrogen is/are:
A. Proton
B. Deuteron
C. Triton
D. All of these
5 The chemical properties of all the isotopes of an elements are
A. same
B. different
C. slightly different
D. none of these
6 γ-rays behave like a particle because they explain the
A. Compton effect
B. Photoelectric effect
C. Pair-production
D. all the above
7 Rate of decay is actually described by.
A. Half line
B. Decay constant
C. Mean life
D. Total life
8 A pair of quark and antiquark makes a:
A. Meson
B. Baryon
C. Proton
D. Neutron
9 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
10 Which of the following material has smaller has life
A. uranium
B. polonium
C. radium
D. radian

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