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

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

Question # 2

Different radioactive material have

Question # 3

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

Question # 4

The diameter of an atom is of the order

Question # 5

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

Question # 6

γ-rays behave like a particle because they explain the

Question # 7

When certain nucleus emits aβ-particles, is mass number:

Question # 8

The figure 1.007276μ shows the mass of an:

Question # 9

Radioactivity is

Question # 10

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

Question # 11

Neutron was discovered in

Question # 12

Gamma rays consist of steam of

Question # 13

The most abundant isotope of neon is

Question # 14

Neon gas have three isotopes whose atomic numbers are

Question # 15

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

Question # 16

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

Question # 17

An alpha particle has a charge of

Question # 18

For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is

Question # 19

Structure of the nucleus was explained by

Question # 20

Marie curie and Pierre curie discovered:

Question # 21

Nucleus of a hydrogen atom may contain:

Question # 22

A curie represents a very strong source of

Question # 23

Mass of proton is

Question # 24

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

Question # 25

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

Question # 26

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

Question # 27

Neutron was suggested to be in the nucleus by:

Question # 28

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 # 29

Rutherford performed an experiment on nuclear reactions in:

Question # 30

If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The emission of radiations take place in elements, having charge number greater than
A. 109
B. 82
C. 69
D. 52
2 A pair of quark and antiquark makes a:
A. Meson
B. Baryon
C. Proton
D. Neutron
3 For an atom having atomic number Z and atomic weight A, the charge on the nucleus is
A. A - Z
B. A + Z
C. Z
D. A
4 Curie is a unit of
A. reluctance
B. resistivity
C. binding energy
D. radioactivity
5 In wilson cloud chamber, the air becomes saturated with:
A. Alcohol vapours
B. Water
C. Helium gas
D. Nitrogen gas
6 The range ofβ-particle in air is greater than that ofα-particle by
A. 1000 times
B. 100 times
C. 15 times
D. 10 times
7 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
8 An alpha particle has a charge of
A. +2e
B. -2e
C. -e
D. +3e
9 The chemical behaviour of an atom is determined by
A. binding energy
B. atomic number
C. mass number
D. number of isotopes
10 Examples of moderators used in a fission reactor is/are:
A. Water
B. Heavy water
C. Carbon
D. Hydrocarbon

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