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

Which are not the elementary particles?

Question # 2

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

Question # 3

In radio-active decay, the original element which disintegrate to another element is called

Question # 4

The chemical properties of all the isotopes of an elements are

Question # 5

Which of the following material has smaller has life

Question # 6

When certain nucleus emits aβ-particles, is mass number:

Question # 7

The number of protons inside a nucleus is called

Question # 8

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 # 9

Rate of decay is actually described by.

Question # 10

The diameter of an atom is of the order

Question # 11

Mass of proton is

Question # 12

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

Question # 13

Gamma rays consist of steam of

Question # 14

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

Question # 15

Which of the following material has longer half life

Question # 16

Neutron was suggested to be in the nucleus by:

Question # 17

The energy acquired by a mass of 1g moving with the speed of light is

Question # 18

The number if neutrons in the nucleus of 92U235are

Question # 19

In wilson cloud chamber, the air becomes saturated with:

Question # 20

Which of these is not a radiation detector

Question # 21

When thorium nucleus emits aβ-particle, the daughter nucleus is called:

Question # 22

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

Question # 23

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

Question # 24

The amount of energy equivalent to 1 a.m.u is

Question # 25

Radioactivity

Question # 26

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

Question # 27

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

Question # 28

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

Question # 29

γ-rays behave like a particle because they explain the

Question # 30

The chemical behaviour of an atom is determined by

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The diameter of an atom is of the order
A. 10-125m
B. 10-11m
C. 10-10m
D. 10-9m
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 The range of particle depends upon the factor
A. charge, mass and energy of particle
B. density of medium
C. ionization potential of the atoms
D. all the above
4 How much time, theα-particle more massive than an electron
A. 600
B. 7000
C. 5000
D. 15000
5 Neutron was discovered in
A. 1915
B. 1920
C. 1925
D. 1932
6 After alpha decay the atomic number of the atom
A. increase by four
B. decreases by two
C. increases by two
D. decrease by four
7 The isotope/s of hydrogen is /are:
A. Protium
B. Deuterium
C. Tritium
D. Both (A) and (B)
8 A pair of quark and antiquark makes a:
A. Meson
B. Baryon
C. Proton
D. Neutron
9 Alfa particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
10 For Protium, the mass defect is:
A. Infinite
B. Zero
C. Very large
D. A few grams

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