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

Neutrons are

Question # 2

Nucleon means:

Question # 3

The isotope/s of hydrogen is /are:

Question # 4

According to Rutherford atomic model, the positive charge in an atom

Question # 5

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

Question # 6

γ-rays behave like a particle because they explain the

Question # 7

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

Question # 8

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

Question # 9

A curie represents a very strong source of

Question # 10

The total charge of any nucleus is given as

Question # 11

The half life of uranium-238 is

Question # 12

Radioactivity is

Question # 13

Charge on proton is

Question # 14

Phenomenon of radioactivity is due to disintegration of

Question # 15

Structure of the nucleus was explained by

Question # 16

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

Question # 17

Rutherford performed an experiment on nuclear reactions in:

Question # 18

Radioactivity was discovered by:

Question # 19

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

Question # 20

The half lie of radium-226 is

Question # 21

Pair production take place when energy ofγ-rays photon is

Question # 22

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

Question # 23

The number of protons inside a nucleus is called

Question # 24

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

Question # 25

Binding energy per nucleus is

Question # 26

Radioactivity

Question # 27

Different radioactive material have

Question # 28

How many isotopes of helium are present?

Question # 29

1 amu is equal to.

Question # 30

Alfa particles are

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Electrons are
A. positive charged
B. negatively charged
C. massless
D. neutral
2 Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:
A. 50
B. 100
C. 150
D. 200
3 Fraction of the decaying atoms per unit time is called
A. decay atom
B. decay element
C. decay constant
D. decay
4 The number if neutrons in the nucleus of 92U235are
A. Infinite
B. 92
C. 235
D. 143
5 The chemical properties of an element depends upon the number of
A. electron
B. position
C. photons
D. neutrons
6 Mass of neutron is
A. 1.67 x 10-31kg
B. 1.67 x 10-27kg
C. 9.1 x 10-31kg
D. 1.67 x 10-19kg
7 The isotope/s of hydrogen is /are:
A. Protium
B. Deuterium
C. Tritium
D. Both (A) and (B)
8 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
9 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
10 The emission of radiations take place in elements, having charge number greater than
A. 109
B. 82
C. 69
D. 52

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