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

Radioactivity is

Question # 2

The chemical properties of all the isotopes of an elements are

Question # 3

Radioactivity was discovered by:

Question # 4

Hydrogen atom with only one proton and one neutron in its nucleus, and one electron, is called

Question # 5

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

Question # 6

Proton was discovered by Rutherford in

Question # 7

Curie is a unit of

Question # 8

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 # 9

Neutron was discovered by

Question # 10

How many isotopes of helium are present?

Question # 11

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

Question # 12

Nucleus of a hydrogen atom may contain:

Question # 13

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

Question # 14

When a nucleus emits an alpha particles, its charge number decreases by

Question # 15

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

Question # 16

Structure of the nucleus was explained by

Question # 17

After alpha decay the atomic number of the atom

Question # 18

1 amu is equal to.

Question # 19

Neutrons are

Question # 20

Nucleon means:

Question # 21

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

Question # 22

Radioactivity

Question # 23

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

Question # 24

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

Question # 25

Rate of decay is actually described by.

Question # 26

The number of protons inside a nucleus is called

Question # 27

The rate of decay of radioactive substance

Question # 28

Neon gas have three isotopes whose atomic numbers are

Question # 29

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

Question # 30

The half life of radioactive substances depends upon

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The number of all the protons and neutrons in a nucleus is known as
A. atomic number
B. mass number
C. charge number
D. none of these
2 Phenomenon of radioactivity is due to disintegration of
A. nucleus
B. neutron
C. proton
D. molecule
3 The missing mass which is converted to energy in the formation of nucleus, is called
A. packing fraction
B. mass defect
C. binding energy
D. none of these
4 The rate of decay of radioactive substance
A. is constant
B. decrease exponentially with time
C. varies inversely as time
D. decreases linearly with time
5 When a charged particle passes through matter, it produces ionization, this effect is used in
A. fission reaction
B. reactor
C. radiation detector
D. fusion reaction
6 Radium was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. Rutherford
7 The number of protons inside a nucleus is called
A. mass number
B. atomic weight
C. atomic number
D. none of these
8 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
9 Electrons are
A. positive charged
B. negatively charged
C. massless
D. neutral
10 The half life of radioactive substances depends upon
A. amount of substance
B. energy of substance
C. state of substance
D. temperature of substance

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