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 nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains

Question # 2

Radioactivity was discovered by

Question # 3

The nucleus/nuclei of hydrogen is/are:

Question # 4

For Protium, the mass defect is:

Question # 5

The number of protons inside a nucleus is called

Question # 6

Radiation detector are used to

Question # 7

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

Question # 8

Nucleus of a hydrogen atom may contain:

Question # 9

The penetration power ofβ-particle is

Question # 10

Radioactivity is

Question # 11

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

Question # 12

Rutherford performed an experiment on nuclear reactions in:

Question # 13

In wilson cloud chamber, the air becomes saturated with:

Question # 14

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

Question # 15

Radioactivity was discovered by:

Question # 16

Neutrons are

Question # 17

Neutron was disvovered by:

Question # 18

Proton was discovered by Rutherford in

Question # 19

Alfa particles are

Question # 20

The half lie of radium-226 is

Question # 21

Fraction of the decaying atoms per unit time is called

Question # 22

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

Question # 23

The chemical behaviour of an atom is determined by

Question # 24

There is present in paraffin a large amount of:

Question # 25

Nucleon means:

Question # 26

γ-rays are

Question # 27

Maric Curie and Pieree Curie discovered two new radioactive elements, which are called

Question # 28

The rate of decay of radioactive substance

Question # 29

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

Question # 30

Beta particles are

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The number of isotopes of hydrogen are
A. 2
B. 1
C. 3
D. 4
2 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
3 Neutron was discovered in
A. 1915
B. 1920
C. 1925
D. 1932
4 U-238 present in the natural uranium is about:
A. 59%
B. 0.007%
C. 99%
D. 39%
5 The rate of decay of a radioactive substance
A. decrease exponentially with time
B. decreases linearly with time
C. increases linearly with time
D. increases exponentially with time
6 When thorium nucleus emits aβ-particle, the daughter nucleus is called:
A. Protactinium
B. Actinium
C. Uranium
D. Radium
7 The total charge of any nucleus is given as
A. Ze2
B. Z2e
C. Z/e
D. Ze
8 In wilson cloud chamber, the air becomes saturated with:
A. Alcohol vapours
B. Water
C. Helium gas
D. Nitrogen gas
9 Marie curie and Pierre curie discovered:
A. Uranium
B. Polonium
C. Radium
D. Both (A) and (C)
10 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

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