ECAT Pre General Science Physics Chapter 21 MCQ Test With Answer

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

Neutron was discovered by

Question # 2

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

Question # 3

Radium was discovered by:

Question # 4

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

Question # 5

Neutrons are

Question # 6

Which of the following material has longer half life

Question # 7

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

Question # 8

Gamma rays consist of steam of

Question # 9

Alfa particles are

Question # 10

Curie is a unit of

Question # 11

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

Question # 12

After alpha decay the atomic number of the atom

Question # 13

Fraction of the decaying atoms per unit time is called

Question # 14

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

Question # 15

The most abundant isotope of neon is

Question # 16

Which of these is not a radiation detector

Question # 17

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

Question # 18

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

Question # 19

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

Question # 20

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

Question # 21

When a nucleus emits an alpha particles, its charge number decreases by

Question # 22

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

Question # 23

1 amu is equal to

Question # 24

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

Question # 25

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

Question # 26

The distance travelled byα-particle in a medium before coming to rest, is called

Question # 27

Electrons are

Question # 28

A curie represents a very strong source of

Question # 29

Radioactivity was discovered by

Question # 30

Proton was discovered by Rutherford in

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 In radio-active decay, the original element which disintegrate to another element is called
A. element
B. daughter element
C. parent element
D. none of these
2 Nucleus consists of
A. proton and neutron
B. protons and electron
C. electron and neutron
D. protons only
3 The diameter of an atom is of the order
A. 10-125m
B. 10-11m
C. 10-10m
D. 10-9m
4 The nucleus left after the emission of some radiation is called:
A. Parent nucleus
B. Daughter necleus
C. Mother necleus
D. Any of these
5 The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains
A. 3 more neutrons
B. 3 more electrons
C. 3 more protons
D. 3 more ions
6 The unit of decay constant is
A. sex
B. sec2
C. sec-1
D. sec-2
7 Neutron was discovered in
A. 1915
B. 1920
C. 1925
D. 1932
8 Neutron was discovered by
A. Curie
B. Roentgen
C. Chadwick
D. Rutherford
9 In 1932 Chadwick discovered
A. proton
B. neutron
C. photon
D. electron
10 A pair of quark and antiquark makes a:
A. Meson
B. Baryon
C. Proton
D. Neutron

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