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

Phenomenon of radioactivity is due to disintegration of

Question # 2

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

Question # 3

Curie is a unit of

Question # 4

The number if neutrons in the nucleus of 92U235are

Question # 5

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

Question # 6

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

Question # 7

The diameter of an atom is of the order

Question # 8

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

Question # 9

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

Question # 10

Nucleus of a hydrogen atom may contain:

Question # 11

Neutron was discovered in

Question # 12

For an atom having atomic number Z and atomic weight A, the number of electron in an atoms

Question # 13

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

Question # 14

Heavy water is made of one oxygen atom and two atoms of:

Question # 15

Charge on proton is

Question # 16

Charge on neutron is

Question # 17

The half life of uranium-238 is

Question # 18

Structure of the nucleus was explained by

Question # 19

Rate of decay is actually described by.

Question # 20

Fraction of the decaying atoms per unit time is called

Question # 21

Radioactivity was discovered by

Question # 22

Which of the following material has smaller has life

Question # 23

A curie represents a very strong source of

Question # 24

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

Question # 25

The unit of decay constant is:

Question # 26

The chemical properties of all the isotopes of an elements are

Question # 27

A mass spectrograph sort out

Question # 28

Neutron was discovered by

Question # 29

Gamma rays consist of steam of

Question # 30

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 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
2 γ-rays are
A. electrostatic waves
B. electromagnetic waves
C. heavy particles
D. longitudinal waves
3 Three quarks make:
A. An electron
B. A meson
C. A baryon
D. A photon
4 For an atom having atomic number Z and atomic weight A, the number of electron in an atoms
A. A - Z
B. A + Z
C. Z
D. A
5 Heavy water is made of one oxygen atom and two atoms of:
A. Protium
B. Deuterium
C. Tritium
D. Any of these
6 A curie represents a very strong source of
A. α-particle
B. β-particle
C. γ-particle
D. none of these
7 When radioactive nucleus emits aβ-particle, the proton-neutron ratio
A. decrease
B. increase
C. same
D. none of these
8 For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is
A. A - Z
B. A
C. Z
D. A + Z
9 Radioactivity was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. All of them
10 Hydrogen atom with only one proton and one neutron in its nucleus, and one electron, is called
A. deuterium
B. protium
C. tritium
D. none of these

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