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

Question # 2

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

Question # 3

Charge on proton is

Question # 4

The half life of uranium-238 is

Question # 5

Beta particles are

Question # 6

When certain nucleus emits anα particle, its mass number:

Question # 7

Mass of neutron is

Question # 8

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

Question # 9

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

Question # 10

The time required for a radioactive material to decrease in active by one half is called

Question # 11

Radiation detector are used to

Question # 12

Neutron was disvovered by:

Question # 13

γ-rays behave like a particle because they explain the

Question # 14

In wilson cloud chamber, the air becomes saturated with:

Question # 15

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

Question # 16

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

Question # 17

For an atom having atomic number Z and atomic weight A, the charge on the nucleus is

Question # 18

Electrons are

Question # 19

Which of the following material has longer half life

Question # 20

The rate of decay of a radioactive substance

Question # 21

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

Question # 22

The unit of decay constant is:

Question # 23

Three quarks make:

Question # 24

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

Question # 25

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

Question # 26

The chemical properties of an element depends upon the number of

Question # 27

Which of the following material has smaller has life

Question # 28

The half life of radioactive substances depends upon

Question # 29

The chemical properties of all the isotopes of an elements are

Question # 30

The distance travelled byα-particle in a medium before coming to rest, is called

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Different radioactive material have
A. same half lives
B. different half lives
C. same mean lives
D. same total lives
2 Heavy water is made of one oxygen atom and two atoms of:
A. Protium
B. Deuterium
C. Tritium
D. Any of these
3 When certain nucleus emits anα particle, its mass number:
A. Increases by one
B. Decreases by one
C. Remain same
D. Decreases by four
4 The time required for a radioactive material to decrease in active by one half is called
A. half time
B. half life
C. disintegration time
D. mean life
5 Neon gas have three isotopes whose atomic numbers are
A. 20, 24 , 23
B. 20, 21 , 22
C. 20, 19 , 21
D. none of these
6 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
7 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
8 Marie curie and Pierre curie discovered:
A. Uranium
B. Polonium
C. Radium
D. Both (A) and (C)
9 A pair of quark and antiquark makes a:
A. Meson
B. Baryon
C. Proton
D. Neutron
10 The range of particle depends upon the factor
A. charge, mass and energy of particle
B. density of medium
C. ionization potential of the atoms
D. all the above

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