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

A pair of quark and antiquark makes a:

Question # 2

The unit of decay constant is:

Question # 3

Radioactivity was discovered by

Question # 4

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

Question # 5

The number of all the protons and neutrons in a nucleus is known as

Question # 6

The half life of radioactive substances depends upon

Question # 7

Rutherford performed an experiment on nuclear reactions in:

Question # 8

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

Question # 9

U-238 present in the natural uranium is about:

Question # 10

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

Question # 11

Which of these is not a radiation detector

Question # 12

The unit of decay constant is

Question # 13

Nucleon means:

Question # 14

Radioactivity was discovered by:

Question # 15

β-particles are easily deflected by collisions than heavy

Question # 16

Neon gas have three isotopes whose atomic numbers are

Question # 17

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

Question # 18

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

Question # 19

The chemical properties of an element depends upon the number of

Question # 20

Which of the following material has longer half life

Question # 21

According to Rutherford atomic model, the positive charge in an atom

Question # 22

Mass of neutron is

Question # 23

γ-rays are

Question # 24

Pair production take place when energy ofγ-rays photon is

Question # 25

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 # 26

Structure of the nucleus was explained by

Question # 27

Curie is a unit of

Question # 28

There is present in paraffin a large amount of:

Question # 29

When radioactive nucleus emits aβ-particle, the proton-neutron ratio

Question # 30

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The rate of decay of a radioactive substance
A. decrease exponentially with time
B. decreases linearly with time
C. increases linearly with time
D. increases exponentially with time
2 Proton was discovered by Rutherford in
A. 1915
B. 1906
C. 1910
D. 1920
3 For an atom having atomic number Z and atomic weight A, the number of electron in an atoms
A. A - Z
B. A + Z
C. Z
D. A
4 Radioactivity
A. is exhibited more by semiconductors in general
B. in exhibited more by the element when they are coupled
C. with other radioactive elements by a covalent bond
D. is an atomic property of radioactive elements
5 A pair of quark and antiquark makes a:
A. Meson
B. Baryon
C. Proton
D. Neutron
6 How many isotopes of helium are present?
A. 1
B. 2
C. 3
D. 4
7 Mass of proton is
A. 1.67 x 10-27kg
B. 1.67 x 10-31kg
C. 1.66 x 10-34kg
D. 1.67 x 10-17kg
8 The unit of decay constant is:
A. Second
B. Metre
C. Hour
D. Year
9 The chemical behaviour of an atom is determined by
A. binding energy
B. atomic number
C. mass number
D. number of isotopes
10 The amount of energy equivalent to 1 a.m.u is
A. 9.315 Mev
B. 93.15 Mev
C. 931.5 Mev
D. 2.22 Mev

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