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

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

Question # 2

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

Question # 3

When certain nucleus emits anα particle, its mass number:

Question # 4

Binding energy per nucleus is

Question # 5

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

Question # 6

Neutron was discovered in

Question # 7

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

Question # 8

Phenomenon of radioactivity is due to disintegration of

Question # 9

Mass of neutron is

Question # 10

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

Question # 11

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

Question # 12

How much time, theα-particle more massive than an electron

Question # 13

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

Question # 14

Rutherford performed an experiment on nuclear reactions in:

Question # 15

The rate of decay of radioactive substance

Question # 16

Nucleus consists of

Question # 17

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

Question # 18

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

Question # 19

Radioactivity was discovered by

Question # 20

The number of protons inside a nucleus is called

Question # 21

The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains

Question # 22

Proton was discovered by Rutherford in

Question # 23

Which of the following material has smaller has life

Question # 24

After alpha decay the atomic number of the atom

Question # 25

The energy is found from Einstein's mass energy relation is called

Question # 26

Radioactivity

Question # 27

Charge on neutron is

Question # 28

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

Question # 29

Electrons are

Question # 30

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Radium was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. Rutherford
2 When certain nucleus emits anα particle, its mass number:
A. Increases by one
B. Decreases by one
C. Remain same
D. Decreases by four
3 Radioactivity
A. is exhibited more by semiconductors in general
B. in exhibited more by the element when they are coupled
C. with other radioactive elements by a covalent bond
D. is an atomic property of radioactive elements
4 Radioactivity was discovered by
A. Rutherford
B. Henri Becqureal
C. Maxwell
D. James Chadwick
5 Which of the following material has smaller has life
A. uranium
B. polonium
C. radium
D. radian
6 β-particles are easily deflected by collisions than heavy
A. α-particles
B. β-particles
C. γ-particles
D. none of these
7 If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by
A. -4
B. 4
C. 2
D. 1
8 Rate of decay is actually described by.
A. Half line
B. Decay constant
C. Mean life
D. Total life
9 The total charge of any nucleus is given as
A. Ze2
B. Z2e
C. Z/e
D. Ze
10 Binding energy per nucleus is
A. greater for heavy nucleus
B. least for heavy nucleus
C. greatest for light nuclei
D. decreases for medium weight niclei

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