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

Which are not the elementary particles?

Question # 2

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

Question # 3

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

Question # 4

An alpha particle has a charge of

Question # 5

Radiation detector are used to

Question # 6

Neutron was disvovered by:

Question # 7

Nucleus of a hydrogen atom may contain:

Question # 8

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

Question # 9

Proton was discovered by Rutherford in

Question # 10

In 1932 Chadwick discovered

Question # 11

Neon gas have three isotopes whose atomic numbers are

Question # 12

γ-rays are

Question # 13

Radium was discovered by:

Question # 14

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

Question # 15

The most abundant isotope of neon is

Question # 16

The chemical behaviour of an atom is determined by

Question # 17

The mass of the nucleus is always less than the total man of the protons and neutron that make up the nucleus. The difference of the two masses is called

Question # 18

The half life of uranium-238 is

Question # 19

The counter, which also provides the power to the G.M. tube is called:

Question # 20

Phenomenon of radioactivity is due to disintegration of

Question # 21

Radioactivity was discovered by:

Question # 22

A curie represents a very strong source of

Question # 23

The number of isotopes of hydrogen are

Question # 24

The reciprocal of decay constant λ of a radioactive material is:

Question # 25

Rate of decay is actually described by.

Question # 26

The number of protons inside a nucleus is called

Question # 27

Neutron was discovered by

Question # 28

The missing mass which is converted to energy in the formation of nucleus, is called

Question # 29

The penetration power ofβ-particle is

Question # 30

Electrons are

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Nucleon means:
A. Only electrons
B. Only neutrons
C. Only protons
D. Both (A ) and (C)
2 Beta particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
3 After alpha decay the atomic number of the atom
A. increase by four
B. decreases by two
C. increases by two
D. decrease by four
4 Proton was discovered by Rutherford in
A. 1915
B. 1906
C. 1910
D. 1920
5 Electrons are
A. positive charged
B. negatively charged
C. massless
D. neutral
6 Heavy water is made of one oxygen atom and two atoms of:
A. Protium
B. Deuterium
C. Tritium
D. Any of these
7 Binding energy per nucleus is
A. greater for heavy nucleus
B. least for heavy nucleus
C. greatest for light nuclei
D. decreases for medium weight niclei
8 Pair production take place when energy ofγ-rays photon is
A. equal to 1.02 Mev-
B. greater than 1.02 Mev
C. less than 1.02 Mev
D. none of these
9 Radiation detector are used to
A. measure intensity of radiation
B. measure energy of radiation
C. difference between different types of radiation
D. all the above
10 When a nucleus emits an alpha particles, its charge number decreases by
A. 3
B. 2
C. 6
D. 5

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