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

00:00
Question # 1

Proton was discovered by Rutherford in

Question # 2

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

Question # 3

Charge on neutron is

Question # 4

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

Question # 5

The total charge of any nucleus is given as

Question # 6

The chemical properties of an element depends upon the number of

Question # 7

The number of protons inside a nucleus is called

Question # 8

Alfa particles are

Question # 9

A mass difference of 0.0012 u is equivalent to and energy of:

Question # 10

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

Question # 11

Rate of decay is actually described by.

Question # 12

In 1932 Chadwick discovered

Question # 13

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

Question # 14

Which of these is not a radiation detector

Question # 15

Binding energy per nucleus is

Question # 16

Different radioactive material have

Question # 17

Radioactivity was discovered by:

Question # 18

Nucleus of a hydrogen atom may contain:

Question # 19

In wilson cloud chamber, the air becomes saturated with:

Question # 20

Which of the following material has longer half life

Question # 21

An alpha particle has a charge of

Question # 22

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

Question # 23

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

Question # 24

The time required for a radioactive material to decrease in active by one half is called

Question # 25

Neutron was suggested to be in the nucleus by:

Question # 26

Electrons are

Question # 27

Nucleus consists of

Question # 28

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

Question # 29

Neutron was discovered by

Question # 30

Neutron was discovered in

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Mass of neutron is
A. 1.67 x 10-31kg
B. 1.67 x 10-27kg
C. 9.1 x 10-31kg
D. 1.67 x 10-19kg
2 γ-rays behave like a particle because they explain the
A. Compton effect
B. Photoelectric effect
C. Pair-production
D. all the above
3 Examples of moderators used in a fission reactor is/are:
A. Water
B. Heavy water
C. Carbon
D. Hydrocarbon
4 Curie is a unit of
A. reluctance
B. resistivity
C. binding energy
D. radioactivity
5 γ-rays are
A. electrostatic waves
B. electromagnetic waves
C. heavy particles
D. longitudinal waves
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 Neutron was disvovered by:
A. Rutherford in 1920
B. Chadwick in 1922
C. Bohr in 1913
D. Compton in 1927
8 The half lie of radium-226 is
A. 238 years
B. 4.5 x 109days
C. 1620 years
D. 332 years
9 The diameter of an atom is of the order
A. 10-125m
B. 10-11m
C. 10-10m
D. 10-9m
10 The reciprocal of decay constant λ of a radioactive material is:
A. Frequency
B. Half life
C. Year
D. Mean life

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