ECAT Pre General Science Physics Chapter 21 MCQ Test With Answer

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

The number if neutrons in the nucleus of 92U235are

Question # 2

Three quarks make:

Question # 3

The energy acquired by a mass of 1g moving with the speed of light is

Question # 4

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

Question # 5

Which are not the elementary particles?

Question # 6

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

Question # 7

How many isotopes of helium are present?

Question # 8

Radioactivity was discovered by

Question # 9

The rate of decay of radioactive substance

Question # 10

Neutron was suggested to be in the nucleus by:

Question # 11

Nucleus of a hydrogen atom may contain:

Question # 12

Curie is a unit of

Question # 13

Charge on proton is

Question # 14

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

Question # 15

Charge on neutron is

Question # 16

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

Question # 17

Radioactivity was discovered by:

Question # 18

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

Question # 19

Alfa , beta and gamma rays are emitted from a radio-active substance

Question # 20

Alfa particles are

Question # 21

Mass of neutron is

Question # 22

An alpha particle has a charge of

Question # 23

The half life of radioactive substances depends upon

Question # 24

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

Question # 25

The figure 1.007276μ shows the mass of an:

Question # 26

The most abundant isotope of neon is

Question # 27

Binding energy per nucleus is

Question # 28

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

Question # 29

The total charge of any nucleus is given as

Question # 30

Rate of decay is actually described by.

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The energy is found from Einstein's mass energy relation is called
A. binding energy of electron
B. binding energy of proton
C. binding energy of neutron
D. binding energy of nucleus
2 Different radioactive material have
A. same half lives
B. different half lives
C. same mean lives
D. same total lives
3 Hydrogen atom with only one proton and one neutron in its nucleus, and one electron, is called
A. deuterium
B. protium
C. tritium
D. none of these
4 The half life of radioactive substances depends upon
A. amount of substance
B. energy of substance
C. state of substance
D. temperature of substance
5 Which are not the elementary particles?
A. Photons
B. Leptons
C. Hadrons
D. Quarks
6 The unit of decay constant is:
A. Second
B. Metre
C. Hour
D. Year
7 1 amu is equal to.
A. 1.66 x 10-24kg
B. 1.66 x 10-19kg
C. 1.66 x 10-24kg
D. 1.66 x 10-27kg
8 The diameter of an atom is of the order
A. 10-125m
B. 10-11m
C. 10-10m
D. 10-9m
9 The number if neutrons in the nucleus of 92U235are
A. Infinite
B. 92
C. 235
D. 143
10 The number of isotopes of hydrogen are
A. 2
B. 1
C. 3
D. 4

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