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

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

Question # 2

Nucleus of a hydrogen atom may contain:

Question # 3

Phenomenon of radioactivity is due to disintegration of

Question # 4

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

Question # 5

Neutrons are

Question # 6

The reciprocal of decay constant λ of a radioactive material is:

Question # 7

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

Question # 8

A mass spectrograph sort out

Question # 9

Beta particles are

Question # 10

Different radioactive material have

Question # 11

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

Question # 12

The time required for a radioactive material to decrease in active by one half is called

Question # 13

Fraction of the decaying atoms per unit time is called

Question # 14

γ-rays are

Question # 15

Radioactivity was discovered by:

Question # 16

The most abundant isotope of neon is

Question # 17

Neutron was disvovered by:

Question # 18

Radioactivity was discovered by

Question # 19

γ-rays behave like a particle because they explain the

Question # 20

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

Question # 21

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

Question # 22

The half lie of radium-226 is

Question # 23

Pair production take place when energy ofγ-rays photon is

Question # 24

Neutron was discovered by

Question # 25

Curie is a unit of

Question # 26

The figure 1.007276μ shows the mass of an:

Question # 27

1 amu is equal to

Question # 28

Charge on neutron is

Question # 29

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

Question # 30

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Referring to the above figure, we can say that of all the elements, the most stable element is
A. Phosphours
B. Iron
C. uranium
D. Lithium
2 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
3 Mass of proton is of order of
A. 10-31gm
B. 10-27kg
C. 10-24gm
D. 10+27kg
4 The nuclei of an element having the same charge number but different mass numbers are called:
A. Isobars
B. Isotopes
C. Isomers
D. Isobaric
5 For Protium, the mass defect is:
A. Infinite
B. Zero
C. Very large
D. A few grams
6 The unit of decay constant is
A. sex
B. sec2
C. sec-1
D. sec-2
7 The missing mass which is converted to energy in the formation of nucleus, is called
A. packing fraction
B. mass defect
C. binding energy
D. none of these
8 Neutron was discovered in
A. 1915
B. 1920
C. 1925
D. 1932
9 The penetration power ofβ-particle is
A. zero
B. less thanα-particle
C. equal toα-particle
D. greater thanα-particle
10 The nucleus left after the emission of some radiation is called:
A. Parent nucleus
B. Daughter necleus
C. Mother necleus
D. Any of these

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