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

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

Question # 2

Structure of the nucleus was explained by

Question # 3

The rate of decay of a radioactive substance

Question # 4

The number of isotopes of hydrogen are

Question # 5

The isotope/s of hydrogen is /are:

Question # 6

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

Question # 7

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 # 8

Charge on neutron is

Question # 9

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

Question # 10

An alpha particle has a charge of

Question # 11

The total charge of any nucleus is given as

Question # 12

Radium was discovered by:

Question # 13

A mass spectrograph sort out

Question # 14

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

Question # 15

A mass difference of 0.0012 u is equivalent to and energy of:

Question # 16

Neutron was discovered by

Question # 17

Which of the following material has smaller has life

Question # 18

The half lie of radium-226 is

Question # 19

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

Question # 20

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

Question # 21

U-238 present in the natural uranium is about:

Question # 22

Different radioactive material have

Question # 23

The penetration power ofβ-particle is

Question # 24

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

Question # 25

The chemical properties of all the isotopes of an elements are

Question # 26

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

Question # 27

Neutron was suggested to be in the nucleus by:

Question # 28

When a nucleus emits an alpha particle, it atomic mass decreased by

Question # 29

Rate of decay is actually described by.

Question # 30

The unit of decay constant is

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Mass of proton is of order of
A. 10-31gm
B. 10-27kg
C. 10-24gm
D. 10+27kg
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 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 If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be
A. Equal to 1
B. Less than 1
C. Greater than 1
D. Infinity
5 Examples of moderators used in a fission reactor is/are:
A. Water
B. Heavy water
C. Carbon
D. Hydrocarbon
6 The chemical behaviour of an atom is determined by
A. binding energy
B. atomic number
C. mass number
D. number of isotopes
7 Neutron was discovered by
A. Curie
B. Roentgen
C. Chadwick
D. Rutherford
8 Which of the following material has smaller has life
A. uranium
B. polonium
C. radium
D. radian
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 Radioactivity was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. All of them

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