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

Radioactivity was discovered by

Question # 2

Pair production take place when energy ofγ-rays photon is

Question # 3

In 1932 Chadwick discovered

Question # 4

The most abundant isotope of neon is

Question # 5

How many isotopes of helium are present?

Question # 6

Nucleon means:

Question # 7

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

Question # 8

Mass of proton is of order of

Question # 9

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

Question # 10

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

Question # 11

Curie is a unit of

Question # 12

Neutron was disvovered by:

Question # 13

Which of the following material has smaller has life

Question # 14

The total charge of any nucleus is given as

Question # 15

Neutron was suggested to be in the nucleus by:

Question # 16

β-particles are easily deflected by collisions than heavy

Question # 17

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

Question # 18

The chemical properties of all the isotopes of an elements are

Question # 19

1 amu is equal to

Question # 20

The half lie of radium-226 is

Question # 21

The rate of decay of radioactive substance

Question # 22

The half life of radioactive substances depends upon

Question # 23

Neon gas have three isotopes whose atomic numbers are

Question # 24

The chemical properties of an element depends upon the number of

Question # 25

Charge on proton is

Question # 26

Nucleus consists of

Question # 27

Beta particles are

Question # 28

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

Question # 29

The nucleus left after the emission of some radiation is called:

Question # 30

A curie represents a very strong source of

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The half life of uranium-238 is
A. 6.2 x 109years
B. 4.5 x 109days
C. 4.5 x 109years
D. 1.3 x 106years
2 Radium was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. Rutherford
3 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
4 How many isotopes of helium are present?
A. 1
B. 2
C. 3
D. 4
5 The total charge of any nucleus is given as
A. Ze2
B. Z2e
C. Z/e
D. Ze
6 The nucleus left after the emission of some radiation is called:
A. Parent nucleus
B. Daughter necleus
C. Mother necleus
D. Any of these
7 Charge on neutron is
A. 1.6 x 10-19C
B. zero
C. -1.6 x 10-19C
D. 1.2 x 10-19C
8 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
9 A pair of quark and antiquark makes a:
A. Meson
B. Baryon
C. Proton
D. Neutron
10 Phenomenon of radioactivity is due to disintegration of
A. nucleus
B. neutron
C. proton
D. molecule

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