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

How many isotopes of helium are present?

Question # 2

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

Question # 3

Neutrons are

Question # 4

The total charge of any nucleus is given as

Question # 5

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

Question # 6

The number of isotopes of hydrogen are

Question # 7

Nucleus consists of

Question # 8

Rutherford performed an experiment on nuclear reactions in:

Question # 9

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

Question # 10

γ-rays are

Question # 11

An alpha particle has a charge of

Question # 12

Mass of neutron is

Question # 13

Nuclei that have the same charge number but different mass number are called

Question # 14

A curie represents a very strong source of

Question # 15

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

Question # 16

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

Question # 17

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

Question # 18

Which of these is not a radiation detector

Question # 19

Fraction of the decaying atoms per unit time is called

Question # 20

After alpha decay the atomic number of the atom

Question # 21

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

Question # 22

The unit of decay constant is:

Question # 23

The diameter of an atom is of the order

Question # 24

1 amu is equal to

Question # 25

Three quarks make:

Question # 26

The penetration power ofβ-particle is

Question # 27

Binding energy per nucleus is

Question # 28

The half lie of radium-226 is

Question # 29

Alfa , beta and gamma rays are emitted from a radio-active substance

Question # 30

Marie curie and Pierre curie discovered:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 In his experiment on nuclear reactions, Rutherford bombardedα particles on:
A. Nitrogen
B. Hydrogen
C. Lead
D. Oxygen
2 The chemical properties of all the isotopes of an elements are
A. same
B. different
C. slightly different
D. none of these
3 Mass of neutron is
A. 1.67 x 10-31kg
B. 1.67 x 10-27kg
C. 9.1 x 10-31kg
D. 1.67 x 10-19kg
4 When a nucleus emits an alpha particles, its charge number decreases by
A. 3
B. 2
C. 6
D. 5
5 U-238 present in the natural uranium is about:
A. 59%
B. 0.007%
C. 99%
D. 39%
6 When certain nucleus emits anα particle, its mass number:
A. Increases by one
B. Decreases by one
C. Remain same
D. Decreases by four
7 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
8 Beta particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
9 Rutherford performed an experiment on nuclear reactions in:
A. 1718 A.D
B. 1818 A.D
C. 1918 A.D
D. 2001 A.D.
10 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

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