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

Which are not the elementary particles?

Question # 2

Nucleus consists of

Question # 3

Curie is a unit of

Question # 4

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

Question # 5

Neutron was discovered by

Question # 6

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

Question # 7

1 amu is equal to.

Question # 8

Gamma rays consist of steam of

Question # 9

The nucleus/nuclei of hydrogen is/are:

Question # 10

Radioactivity

Question # 11

1 amu is equal to

Question # 12

A curie represents a very strong source of

Question # 13

In 1932 Chadwick discovered

Question # 14

Electrons are

Question # 15

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

Question # 16

The half lie of radium-226 is

Question # 17

Examples of moderators used in a fission reactor is/are:

Question # 18

Mass of proton is

Question # 19

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

Question # 20

During the nuclear changes, the law/s of conservation that hold/s are that of:

Question # 21

The unit of decay constant is

Question # 22

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

Question # 23

Radioactivity was discovered by

Question # 24

A particle having the mass of electron and charge of a proton is called a

Question # 25

Rate of decay is actually described by.

Question # 26

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

Question # 27

The number of protons inside a nucleus is called

Question # 28

In wilson cloud chamber, the air becomes saturated with:

Question # 29

Which of these is not a radiation detector

Question # 30

The rate of decay of a radioactive substance

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Sr.# Question Answer
1 The amount of energy equivalent to 1 a.m.u is
A. 9.315 Mev
B. 93.15 Mev
C. 931.5 Mev
D. 2.22 Mev
2 The half lie of radium-226 is
A. 238 years
B. 4.5 x 109days
C. 1620 years
D. 332 years
3 There is present in paraffin a large amount of:
A. Nitrogen
B. Hydrogen
C. Carbon
D. Baryllium
4 Phenomenon of radioactivity is due to disintegration of
A. nucleus
B. neutron
C. proton
D. molecule
5 When a charged particle passes through matter, it produces ionization, this effect is used in
A. fission reaction
B. reactor
C. radiation detector
D. fusion reaction
6 An alpha particle has a charge of
A. +2e
B. -2e
C. -e
D. +3e
7 In 1932 Chadwick discovered
A. proton
B. neutron
C. photon
D. electron
8 How many isotopes of helium are present?
A. 1
B. 2
C. 3
D. 4
9 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
10 In radioactive decay, the new element which is formed due to the disintegration of original element is called
A. element
B. daughter element
C. parent element
D. none of these

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