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

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

Question # 2

The diameter of an atom is of the order

Question # 3

Neutron was discovered by

Question # 4

Neutrons are

Question # 5

Beta particles are

Question # 6

The number if neutrons in the nucleus of 92U235are

Question # 7

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

Question # 8

There is present in paraffin a large amount of:

Question # 9

Heavy water is made of one oxygen atom and two atoms of:

Question # 10

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

Question # 11

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

Question # 12

U-238 present in the natural uranium is about:

Question # 13

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

Question # 14

Nucleus consists of

Question # 15

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

Question # 16

Alfa particles are

Question # 17

A mass spectrograph sort out

Question # 18

The total charge of any nucleus is given as

Question # 19

Which are not the elementary particles?

Question # 20

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

Question # 21

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

Question # 22

Proton was discovered by Rutherford in

Question # 23

The half life of uranium-238 is

Question # 24

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

Question # 25

γ-rays are

Question # 26

Nucleus of a hydrogen atom may contain:

Question # 27

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

Question # 28

1 amu is equal to.

Question # 29

After alpha decay the atomic number of the atom

Question # 30

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

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Sr.# Question Answer
1 If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by
A. -4
B. 4
C. 2
D. 1
2 Examples of moderators used in a fission reactor is/are:
A. Water
B. Heavy water
C. Carbon
D. Hydrocarbon
3 Structure of the nucleus was explained by
A. J.J Thomson
B. Bohr
C. Millikan
D. Rutherford
4 In wilson cloud chamber, the air becomes saturated with:
A. Alcohol vapours
B. Water
C. Helium gas
D. Nitrogen gas
5 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
6 The distance travelled byα-particle in a medium before coming to rest, is called
A. range ofγ-particle
B. range of neutrons
C. range of particle
D. none of these
7 Which of the following material has smaller has life
A. uranium
B. polonium
C. radium
D. radian
8 The nuclei of an element having the same charge number but different mass numbers are called:
A. Isobars
B. Isotopes
C. Isomers
D. Isobaric
9 Neutron was discovered in
A. 1915
B. 1920
C. 1925
D. 1932
10 The total charge of any nucleus is given as
A. Ze2
B. Z2e
C. Z/e
D. Ze

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