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

Different radioactive material have

Question # 2

The counter, which also provides the power to the G.M. tube is called:

Question # 3

Neutron was discovered by

Question # 4

Mass of proton is

Question # 5

In his experiment on nuclear reactions, Rutherford bombardedα particles on:

Question # 6

The total charge of any nucleus is given as

Question # 7

Pair production take place when energy ofγ-rays photon is

Question # 8

Which of the following material has longer half life

Question # 9

Neutron was disvovered by:

Question # 10

In radio-active decay, the original element which disintegrate to another element is called

Question # 11

Which of the following material has smaller has life

Question # 12

Radioactivity is

Question # 13

The figure 1.007276μ shows the mass of an:

Question # 14

Beta particles are

Question # 15

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

Question # 16

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

Question # 17

The half life of uranium-238 is

Question # 18

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

Question # 19

Radioactivity

Question # 20

1 amu is equal to

Question # 21

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

Question # 22

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

Question # 23

The nucleus left after the emission of some radiation is called:

Question # 24

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

Question # 25

Neutron was discovered in

Question # 26

Phenomenon of radioactivity is due to disintegration of

Question # 27

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

Question # 28

The number if neutrons in the nucleus of 92U235are

Question # 29

The range of particle depends upon the factor

Question # 30

Which of these is not a radiation detector

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Nucleus consists of
A. proton and neutron
B. protons and electron
C. electron and neutron
D. protons only
2 The number of isotopes of hydrogen are
A. 2
B. 1
C. 3
D. 4
3 When certain nucleus emits aβ-particles, is mass number:
A. Remain same
B. Increases by one
C. Decreases by one
D. Decreases by four
4 According to Rutherford atomic model, the positive charge in an atom
A. is concentrated at its centre
B. is in the form of positive electron at same distance from its centre
C. is spread uniformly through its volume
D. none of these
5 Neon gas have three isotopes whose atomic numbers are
A. 20, 24 , 23
B. 20, 21 , 22
C. 20, 19 , 21
D. none of these
6 1 amu is equal to.
A. 1.66 x 10-24kg
B. 1.66 x 10-19kg
C. 1.66 x 10-24kg
D. 1.66 x 10-27kg
7 Which are not the elementary particles?
A. Photons
B. Leptons
C. Hadrons
D. Quarks
8 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
9 A particle having the mass of electron and charge of a proton is called a
A. photon
B. position
C. antiproton
D. antineutrino
10 In 1932 Chadwick discovered
A. proton
B. neutron
C. photon
D. electron

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