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

Charge on neutron is

Question # 2

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

Question # 3

The rate of decay of a radioactive substance

Question # 4

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

Question # 5

The nucleus/nuclei of hydrogen is/are:

Question # 6

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

Question # 7

Gamma rays consist of steam of

Question # 8

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

Question # 9

A particle having the mass of electron and charge of a proton is called a

Question # 10

When certain nucleus emits anα particle, its mass number:

Question # 11

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

Question # 12

The emission of radiations take place in elements, having charge number greater than

Question # 13

The diameter of an atom is of the order

Question # 14

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

Question # 15

The isotope/s of hydrogen is /are:

Question # 16

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

Question # 17

Pair production take place when energy ofγ-rays photon is

Question # 18

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

Question # 19

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

Question # 20

Binding energy per nucleus is

Question # 21

A pair of quark and antiquark makes a:

Question # 22

Curie is a unit of

Question # 23

In 1932 Chadwick discovered

Question # 24

How many isotopes of helium are present?

Question # 25

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

Question # 26

Radioactivity

Question # 27

Radioactivity is

Question # 28

The range of particle depends upon the factor

Question # 29

Radioactivity was discovered by:

Question # 30

Charge on proton is

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 When thorium nucleus emits aβ-particle, the daughter nucleus is called:
A. Protactinium
B. Actinium
C. Uranium
D. Radium
2 Marie curie and Pierre curie discovered:
A. Uranium
B. Polonium
C. Radium
D. Both (A) and (C)
3 Electrons are
A. positive charged
B. negatively charged
C. massless
D. neutral
4 The unit of decay constant is:
A. Second
B. Metre
C. Hour
D. Year
5 Rutherford performed an experiment on nuclear reactions in:
A. 1718 A.D
B. 1818 A.D
C. 1918 A.D
D. 2001 A.D.
6 Pair production take place when energy ofγ-rays photon is
A. equal to 1.02 Mev-
B. greater than 1.02 Mev
C. less than 1.02 Mev
D. none of these
7 Mass of proton is of order of
A. 10-31gm
B. 10-27kg
C. 10-24gm
D. 10+27kg
8 Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called
A. deuteron
B. deterium
C. protium
D. tritium
9 Neon gas have three isotopes whose atomic numbers are
A. 20, 24 , 23
B. 20, 21 , 22
C. 20, 19 , 21
D. none of these
10 Maric Curie and Pieree Curie discovered two new radioactive elements, which are called
A. polonium uranium
B. uranium and radium
C. polonium and radium
D. none of these

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