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

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

Question # 2

The rate of decay of radioactive substance

Question # 3

When a charged particle passes through matter, it produces ionization, this effect is used in

Question # 4

Neon gas have three isotopes whose atomic numbers are

Question # 5

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

Question # 6

Which of the following material has smaller has life

Question # 7

Fraction of the decaying atoms per unit time is called

Question # 8

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

Question # 9

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

Question # 10

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

Question # 11

A pair of quark and antiquark makes a:

Question # 12

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

Question # 13

β-particles are easily deflected by collisions than heavy

Question # 14

The figure 1.007276μ shows the mass of an:

Question # 15

The number of protons inside a nucleus is called

Question # 16

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

Question # 17

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

Question # 18

Gamma rays consist of steam of

Question # 19

Rate of decay is actually described by.

Question # 20

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

Question # 21

An alpha particle has a charge of

Question # 22

Alfa particles are

Question # 23

1 amu is equal to.

Question # 24

γ-rays behave like a particle because they explain the

Question # 25

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

Question # 26

Nucleus consists of

Question # 27

Radium was discovered by:

Question # 28

Radioactivity is

Question # 29

The diameter of an atom is of the order

Question # 30

Mass of proton is

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Neutrons are
A. positive charge
B. negatively charged
C. massless
D. neutral
2 Which of the following material has longer half life
A. radium
B. polonium
C. radium
D. uranium
3 In his experiment on nuclear reactions, Rutherford bombardedα particles on:
A. Nitrogen
B. Hydrogen
C. Lead
D. Oxygen
4 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
5 γ-rays behave like a particle because they explain the
A. Compton effect
B. Photoelectric effect
C. Pair-production
D. all the above
6 The range ofβ-particle in air is greater than that ofα-particle by
A. 1000 times
B. 100 times
C. 15 times
D. 10 times
7 Mass of proton is of order of
A. 10-31gm
B. 10-27kg
C. 10-24gm
D. 10+27kg
8 Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:
A. 50
B. 100
C. 150
D. 200
9 Nuclei that have the same charge number but different mass number are called
A. isotones
B. isomers
C. isotopes
D. isobars
10 Examples of moderators used in a fission reactor is/are:
A. Water
B. Heavy water
C. Carbon
D. Hydrocarbon

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