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

Neutron was discovered by

Question # 2

When a nucleus emits an alpha particles, its charge number decreases by

Question # 3

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

Question # 4

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

Question # 5

Radioactivity was discovered by

Question # 6

Radiation detector are used to

Question # 7

How many isotopes of helium are present?

Question # 8

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

Question # 9

Mass of proton is

Question # 10

Neutron was suggested to be in the nucleus by:

Question # 11

Charge on neutron is

Question # 12

1 amu is equal to

Question # 13

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

Question # 14

The amount of energy equivalent to 1 a.m.u is

Question # 15

The isotope/s of hydrogen is /are:

Question # 16

Which of these is not a radiation detector

Question # 17

Electrons are

Question # 18

Pair production take place when energy ofγ-rays photon is

Question # 19

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

Question # 20

Neon gas have three isotopes whose atomic numbers are

Question # 21

The rate of decay of radioactive substance

Question # 22

The chemical properties of an element depends upon the number of

Question # 23

The half lie of radium-226 is

Question # 24

Rate of decay is actually described by.

Question # 25

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

Question # 26

The range ofβ-particle in air is greater than that ofα-particle by

Question # 27

γ-rays are

Question # 28

The emission of radiations take place in elements, having charge number greater than

Question # 29

A curie represents a very strong source of

Question # 30

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Fraction of the decaying atoms per unit time is called
A. decay atom
B. decay element
C. decay constant
D. decay
2 The emission of radiations take place in elements, having charge number greater than
A. 109
B. 82
C. 69
D. 52
3 Neutron was suggested to be in the nucleus by:
A. Rutherford in 1920
B. Bohar in 1913
C. Dirac in 1928
D. Anderson in 1932
4 The most abundant isotope of neon is
A. neon-20
B. neon-21
C. neon-22
D. neon-23
5 An alpha particle has a charge of
A. +2e
B. -2e
C. -e
D. +3e
6 For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is
A. A - Z
B. A
C. Z
D. A + Z
7 The counter, which also provides the power to the G.M. tube is called:
A. Thin mica window
B. thin glass window
C. Airy window
D. Wooden window
8 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
9 Radioactivity was discovered by
A. Rutherford
B. Henri Becqureal
C. Maxwell
D. James Chadwick
10 Gamma rays consist of steam of
A. electron
B. proton
C. photons
D. all of these

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