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

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

Question # 2

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

Question # 3

Marie curie and Pierre curie discovered:

Question # 4

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

Question # 5

Radiation detector are used to

Question # 6

Referring to the above figure, we can say that of all the elements, the most stable element is

Question # 7

Radium was discovered by:

Question # 8

The mass of the nucleus is always less than the total man of the protons and neutron that make up the nucleus. The difference of the two masses is called

Question # 9

Different radioactive material have

Question # 10

How many isotopes of helium are present?

Question # 11

For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is

Question # 12

Gamma rays consist of steam of

Question # 13

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

Question # 14

The total charge of any nucleus is given as

Question # 15

According to Rutherford atomic model, the positive charge in an atom

Question # 16

Alfa particles are

Question # 17

The nuclei of an element having the same charge number but different mass numbers are called:

Question # 18

A curie represents a very strong source of

Question # 19

If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by

Question # 20

Which of these is not a radiation detector

Question # 21

U-238 present in the natural uranium is about:

Question # 22

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

Question # 23

The amount of energy equivalent to 1 a.m.u is

Question # 24

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

Question # 25

When certain nucleus emits anα particle, its mass number:

Question # 26

γ-rays are

Question # 27

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

Question # 28

The isotope/s of hydrogen is /are:

Question # 29

Rate of decay is actually described by.

Question # 30

In 1932 Chadwick discovered

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Which of the following material has smaller has life
A. uranium
B. polonium
C. radium
D. radian
2 Radioactivity is
A. self disruptive activity
B. spontaneous activity
C. exhibited by all elements under proper conditions
D. both 'a' and 'b'
3 Rutherford performed an experiment on nuclear reactions in:
A. 1718 A.D
B. 1818 A.D
C. 1918 A.D
D. 2001 A.D.
4 When a nucleus emits an alpha particle, it atomic mass decreased by
A. 2
B. 1
C. 4
D. 3
5 Neutrons are
A. positive charge
B. negatively charged
C. massless
D. neutral
6 Nuclei that have the same charge number but different mass number are called
A. isotones
B. isomers
C. isotopes
D. isobars
7 Gamma rays consist of steam of
A. electron
B. proton
C. photons
D. all of these
8 Examples of moderators used in a fission reactor is/are:
A. Water
B. Heavy water
C. Carbon
D. Hydrocarbon
9 Electrons are
A. positive charged
B. negatively charged
C. massless
D. neutral
10 Mass of proton is
A. 1.67 x 10-27kg
B. 1.67 x 10-31kg
C. 1.66 x 10-34kg
D. 1.67 x 10-17kg

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