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 chemical properties of all the isotopes of an elements are

Question # 2

The range of particle depends upon the factor

Question # 3

For an atom having atomic number Z and atomic weight A, the number of electron in an atoms

Question # 4

The number of protons inside a nucleus is called

Question # 5

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 # 6

Nuclei that have the same charge number but different mass number are called

Question # 7

Radioactivity is

Question # 8

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

Question # 9

If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by

Question # 10

Neutron was disvovered by:

Question # 11

When a nucleus emits an alpha particles, its charge number decreases by

Question # 12

If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be

Question # 13

During the nuclear changes, the law/s of conservation that hold/s are that of:

Question # 14

The most abundant isotope of neon is

Question # 15

Rutherford performed an experiment on nuclear reactions in:

Question # 16

The number of isotopes of hydrogen are

Question # 17

Which of the following material has smaller has life

Question # 18

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

Question # 19

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

Question # 20

The total charge of any nucleus is given as

Question # 21

The chemical properties of an element depends upon the number of

Question # 22

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

Question # 23

Binding energy per nucleus is

Question # 24

The half lie of radium-226 is

Question # 25

Pair production take place when energy ofγ-rays photon is

Question # 26

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

Question # 27

Neon gas have three isotopes whose atomic numbers are

Question # 28

An alpha particle has a charge of

Question # 29

The half life of radioactive substances depends upon

Question # 30

The number if neutrons in the nucleus of 92U235are

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The range ofβ-particle in air is greater than that ofα-particle by
A. 1000 times
B. 100 times
C. 15 times
D. 10 times
2 Pair production take place when energy ofγ-rays photon is
A. equal to 1.02 Mev-
B. greater than 1.02 Mev
C. less than 1.02 Mev
D. none of these
3 The missing mass which is converted to energy in the formation of nucleus, is called
A. packing fraction
B. mass defect
C. binding energy
D. none of these
4 The chemical properties of an element depends upon the number of
A. electron
B. position
C. photons
D. neutrons
5 Charge on neutron is
A. 1.6 x 10-19C
B. zero
C. -1.6 x 10-19C
D. 1.2 x 10-19C
6 Gamma rays consist of steam of
A. electron
B. proton
C. photons
D. all of these
7 γ-rays behave like a particle because they explain the
A. Compton effect
B. Photoelectric effect
C. Pair-production
D. all the above
8 The number of protons inside a nucleus is called
A. mass number
B. atomic weight
C. atomic number
D. none of these
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 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

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