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 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be

Question # 2

A pair of quark and antiquark makes a:

Question # 3

Neon gas have three isotopes whose atomic numbers are

Question # 4

Examples of moderators used in a fission reactor is/are:

Question # 5

A curie represents a very strong source of

Question # 6

Nucleus consists of

Question # 7

The half lie of radium-226 is

Question # 8

Different radioactive material have

Question # 9

Neutron was suggested to be in the nucleus by:

Question # 10

Structure of the nucleus was explained by

Question # 11

Mass of neutron is

Question # 12

Radioactivity was discovered by:

Question # 13

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

Question # 14

U-238 present in the natural uranium is about:

Question # 15

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

Question # 16

Three quarks make:

Question # 17

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

Question # 18

Beta particles are

Question # 19

The range of particle depends upon the factor

Question # 20

The diameter of an atom is of the order

Question # 21

The reciprocal of decay constant λ of a radioactive material is:

Question # 22

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

Question # 23

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

Question # 24

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

Question # 25

When certain nucleus emits anα particle, its mass number:

Question # 26

γ-rays behave like a particle because they explain the

Question # 27

Rutherford performed an experiment on nuclear reactions in:

Question # 28

How many isotopes of helium are present?

Question # 29

The chemical properties of all the isotopes of an elements are

Question # 30

Which of the following material has smaller has life

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The number of protons inside a nucleus is called
A. mass number
B. atomic weight
C. atomic number
D. none of these
2 Neutron was discovered in
A. 1915
B. 1920
C. 1925
D. 1932
3 The chemical behaviour of an atom is determined by
A. binding energy
B. atomic number
C. mass number
D. number of isotopes
4 Radioactivity is
A. self disruptive activity
B. spontaneous activity
C. exhibited by all elements under proper conditions
D. both 'a' and 'b'
5 Rate of decay is actually described by.
A. Half line
B. Decay constant
C. Mean life
D. Total life
6 The isotope/s of hydrogen is /are:
A. Protium
B. Deuterium
C. Tritium
D. Both (A) and (B)
7 The amount of energy equivalent to 1 a.m.u is
A. 9.315 Mev
B. 93.15 Mev
C. 931.5 Mev
D. 2.22 Mev
8 A particle having the mass of electron and charge of a proton is called a
A. photon
B. position
C. antiproton
D. antineutrino
9 The diameter of an atom is of the order
A. 10-125m
B. 10-11m
C. 10-10m
D. 10-9m
10 Nucleus consists of
A. proton and neutron
B. protons and electron
C. electron and neutron
D. protons only

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