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

Question # 2

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

Question # 3

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

Question # 4

Neutron was suggested to be in the nucleus by:

Question # 5

Nucleus consists of

Question # 6

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

Question # 7

Which of these is not a radiation detector

Question # 8

Rate of decay is actually described by.

Question # 9

The half lie of radium-226 is

Question # 10

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

Question # 11

Radium was discovered by:

Question # 12

Which of the following material has longer half life

Question # 13

γ-rays are

Question # 14

Neutrons are

Question # 15

Mass of neutron is

Question # 16

The nuclei of an element having the same charge number but different mass numbers are called:

Question # 17

In 1932 Chadwick discovered

Question # 18

Neon gas have three isotopes whose atomic numbers are

Question # 19

Mass of proton is of order of

Question # 20

The chemical properties of all the isotopes of an elements are

Question # 21

Neutron was discovered by

Question # 22

The number if neutrons in the nucleus of 92U235are

Question # 23

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

Question # 24

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

Question # 25

Phenomenon of radioactivity is due to disintegration of

Question # 26

After alpha decay the atomic number of the atom

Question # 27

Different radioactive material have

Question # 28

Electrons are

Question # 29

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

Question # 30

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 When certain nucleus emits aβ-particles, is mass number:
A. Remain same
B. Increases by one
C. Decreases by one
D. Decreases by four
2 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
3 1 amu is equal to
A. 1.66 x 10-24kg
B. 1.66 x 10-19kg
C. 1.66 x 10-34kg
D. 1.66 x 10-27kg
4 Neon gas have three isotopes whose atomic numbers are
A. 20, 24 , 23
B. 20, 21 , 22
C. 20, 19 , 21
D. none of these
5 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
6 Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called
A. deuteron
B. deterium
C. protium
D. tritium
7 Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:
A. 50
B. 100
C. 150
D. 200
8 Which of the following material has longer half life
A. radium
B. polonium
C. radium
D. uranium
9 γ-rays behave like a particle because they explain the
A. Compton effect
B. Photoelectric effect
C. Pair-production
D. all the above
10 Neutron was disvovered by:
A. Rutherford in 1920
B. Chadwick in 1922
C. Bohr in 1913
D. Compton in 1927

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