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

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

Question # 2

Nucleus of a hydrogen atom may contain:

Question # 3

The penetration power ofβ-particle is

Question # 4

Which of these is not a radiation detector

Question # 5

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

Question # 6

For an atom having atomic number Z and atomic weight A, the charge on the nucleus is

Question # 7

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

Question # 8

Charge on proton is

Question # 9

When certain nucleus emits anα particle, its mass number:

Question # 10

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

Question # 11

The number of isotopes of hydrogen are

Question # 12

Proton was discovered by Rutherford in

Question # 13

The most abundant isotope of neon is

Question # 14

Radioactivity is

Question # 15

Mass of neutron is

Question # 16

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

Question # 17

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

Question # 18

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

Question # 19

In 1932 Chadwick discovered

Question # 20

β-particles are easily deflected by collisions than heavy

Question # 21

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

Question # 22

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

Question # 23

Three quarks make:

Question # 24

There is present in paraffin a large amount of:

Question # 25

A curie represents a very strong source of

Question # 26

The nucleus/nuclei of hydrogen is/are:

Question # 27

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

Question # 28

Phenomenon of radioactivity is due to disintegration of

Question # 29

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

Question # 30

The isotope/s of hydrogen is /are:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Neutron was discovered in
A. 1915
B. 1920
C. 1925
D. 1932
2 γ-rays behave like a particle because they explain the
A. Compton effect
B. Photoelectric effect
C. Pair-production
D. all the above
3 Neutrons are
A. positive charge
B. negatively charged
C. massless
D. neutral
4 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
5 There is present in paraffin a large amount of:
A. Nitrogen
B. Hydrogen
C. Carbon
D. Baryllium
6 For Protium, the mass defect is:
A. Infinite
B. Zero
C. Very large
D. A few grams
7 The range of particle depends upon the factor
A. charge, mass and energy of particle
B. density of medium
C. ionization potential of the atoms
D. all the above
8 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
9 When a nucleus emits an alpha particles, its charge number decreases by
A. 3
B. 2
C. 6
D. 5
10 β-particles are easily deflected by collisions than heavy
A. α-particles
B. β-particles
C. γ-particles
D. none of these

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