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 most abundant isotope of neon is

Question # 2

For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is

Question # 3

Radium was discovered by:

Question # 4

Phenomenon of radioactivity is due to disintegration of

Question # 5

How many isotopes of helium are present?

Question # 6

Charge on proton is

Question # 7

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

Question # 8

Neutron was discovered by

Question # 9

Radioactivity is

Question # 10

A pair of quark and antiquark makes a:

Question # 11

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

Question # 12

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

Question # 13

The missing mass which is converted to energy in the formation of nucleus, is called

Question # 14

The unit of decay constant is:

Question # 15

Nucleus of a hydrogen atom may contain:

Question # 16

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

Question # 17

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

Question # 18

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

Question # 19

The total charge of any nucleus is given as

Question # 20

Three quarks make:

Question # 21

For an atom having atomic number Z and atomic weight A, the charge on the nucleus is

Question # 22

A mass spectrograph sort out

Question # 23

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

Question # 24

The penetration power ofβ-particle is

Question # 25

The number if neutrons in the nucleus of 92U235are

Question # 26

Rate of decay is actually described by.

Question # 27

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

Question # 28

The number of protons inside a nucleus is called

Question # 29

Which of the following material has longer half life

Question # 30

Gamma rays consist of steam of

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Beta particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
2 The rate of decay of radioactive substance
A. is constant
B. decrease exponentially with time
C. varies inversely as time
D. decreases linearly with time
3 The half lie of radium-226 is
A. 238 years
B. 4.5 x 109days
C. 1620 years
D. 332 years
4 1 amu is equal to.
A. 1.66 x 10-24kg
B. 1.66 x 10-19kg
C. 1.66 x 10-24kg
D. 1.66 x 10-27kg
5 Radium was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. Rutherford
6 Alfa particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
7 In 1932 Chadwick discovered
A. proton
B. neutron
C. photon
D. electron
8 The chemical properties of an element depends upon the number of
A. electron
B. position
C. photons
D. neutrons
9 According to Rutherford atomic model, the positive charge in an atom
A. is concentrated at its centre
B. is in the form of positive electron at same distance from its centre
C. is spread uniformly through its volume
D. none of these
10 The mass of the nucleus is always less than the total man of the protons and neutron that make up the nucleus. The difference of the two masses is called
A. nuclear fission
B. nuclear fusion
C. man defect
D. radioactivity

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