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

Electrons are

Question # 2

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

Question # 3

Curie is a unit of

Question # 4

γ-rays behave like a particle because they explain the

Question # 5

A mass spectrograph sort out

Question # 6

Different radioactive material have

Question # 7

U-238 present in the natural uranium is about:

Question # 8

Neutron was disvovered by:

Question # 9

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

Question # 10

In wilson cloud chamber, the air becomes saturated with:

Question # 11

Heavy water is made of one oxygen atom and two atoms of:

Question # 12

Radium was discovered by:

Question # 13

There is present in paraffin a large amount of:

Question # 14

For Protium, the mass defect is:

Question # 15

Rutherford performed an experiment on nuclear reactions in:

Question # 16

Pair production take place when energy ofγ-rays photon is

Question # 17

The chemical properties of an element depends upon the number of

Question # 18

The number of isotopes of hydrogen are

Question # 19

In 1932 Chadwick discovered

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

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

Question # 23

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

Question # 24

Alfa particles are

Question # 25

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

Question # 26

Three quarks make:

Question # 27

Which of the following material has smaller has life

Question # 28

Fraction of the decaying atoms per unit time is called

Question # 29

Neon gas have three isotopes whose atomic numbers are

Question # 30

Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:

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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 Binding energy per nucleus is
A. greater for heavy nucleus
B. least for heavy nucleus
C. greatest for light nuclei
D. decreases for medium weight niclei
3 U-238 present in the natural uranium is about:
A. 59%
B. 0.007%
C. 99%
D. 39%
4 During the nuclear changes, the law/s of conservation that hold/s are that of:
A. Charge
B. energy
C. Momentum
D. Mass
5 There is present in paraffin a large amount of:
A. Nitrogen
B. Hydrogen
C. Carbon
D. Baryllium
6 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
7 Radioactivity was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. All of them
8 When thorium nucleus emits aβ-particle, the daughter nucleus is called:
A. Protactinium
B. Actinium
C. Uranium
D. Radium
9 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
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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