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

Referring to the above figure, we can say that of all the elements, the most stable element is

Question # 2

Three quarks make:

Question # 3

Which of the following material has smaller has life

Question # 4

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

Question # 5

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

Question # 6

1 amu is equal to.

Question # 7

The chemical properties of an element depends upon the number of

Question # 8

The unit of decay constant is

Question # 9

The total charge of any nucleus is given as

Question # 10

Mass of proton is

Question # 11

Neutron was discovered by

Question # 12

Gamma rays consist of steam of

Question # 13

Rutherford performed an experiment on nuclear reactions in:

Question # 14

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

Question # 15

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

Question # 16

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

Question # 17

Neon gas have three isotopes whose atomic numbers are

Question # 18

The range of particle depends upon the factor

Question # 19

Charge on neutron is

Question # 20

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

Question # 21

The chemical properties of all the isotopes of an elements are

Question # 22

Radium was discovered by:

Question # 23

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

Question # 24

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

Question # 25

In wilson cloud chamber, the air becomes saturated with:

Question # 26

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

Question # 27

The half life of uranium-238 is

Question # 28

A curie represents a very strong source of

Question # 29

When certain nucleus emits anα particle, its mass number:

Question # 30

The half life of radioactive substances depends upon

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by
A. -4
B. 4
C. 2
D. 1
2 The counter, which also provides the power to the G.M. tube is called:
A. Thin mica window
B. thin glass window
C. Airy window
D. Wooden window
3 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
4 Heavy water is made of one oxygen atom and two atoms of:
A. Protium
B. Deuterium
C. Tritium
D. Any of these
5 For Protium, the mass defect is:
A. Infinite
B. Zero
C. Very large
D. A few grams
6 The half lie of radium-226 is
A. 238 years
B. 4.5 x 109days
C. 1620 years
D. 332 years
7 A mass difference of 0.0012 u is equivalent to and energy of:
A. 0.5 Me V
B. 1.13 MeV
C. 5.13 MeV
D. 1.13 keV
8 Neutron was disvovered by:
A. Rutherford in 1920
B. Chadwick in 1922
C. Bohr in 1913
D. Compton in 1927
9 There is present in paraffin a large amount of:
A. Nitrogen
B. Hydrogen
C. Carbon
D. Baryllium
10 The chemical properties of all the isotopes of an elements are
A. same
B. different
C. slightly different
D. none of these

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