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

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

Question # 2

Mass of proton is of order of

Question # 3

How many isotopes of helium are present?

Question # 4

Beta particles are

Question # 5

The rate of decay of a radioactive substance

Question # 6

The energy acquired by a mass of 1g moving with the speed of light is

Question # 7

1 amu is equal to

Question # 8

The range of particle depends upon the factor

Question # 9

Mass of proton is

Question # 10

In 1932 Chadwick discovered

Question # 11

Neutron was discovered in

Question # 12

After alpha decay the atomic number of the atom

Question # 13

Radioactivity

Question # 14

U-238 present in the natural uranium is about:

Question # 15

Electrons are

Question # 16

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

Question # 17

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

Question # 18

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

Question # 19

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

Question # 20

The chemical behaviour of an atom is determined by

Question # 21

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

Question # 22

The half life of uranium-238 is

Question # 23

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 # 24

Fraction of the decaying atoms per unit time is called

Question # 25

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 # 26

Proton was discovered by Rutherford in

Question # 27

The penetration power ofβ-particle is

Question # 28

Which of the following material has smaller has life

Question # 29

Which of the following material has longer half life

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 Mass of proton is of order of
A. 10-31gm
B. 10-27kg
C. 10-24gm
D. 10+27kg
2 Phenomenon of radioactivity is due to disintegration of
A. nucleus
B. neutron
C. proton
D. molecule
3 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
4 A mass spectrograph sort out
A. molecules
B. atoms
C. elements
D. isotopes
5 Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:
A. 50
B. 100
C. 150
D. 200
6 Examples of moderators used in a fission reactor is/are:
A. Water
B. Heavy water
C. Carbon
D. Hydrocarbon
7 Rutherford performed an experiment on nuclear reactions in:
A. 1718 A.D
B. 1818 A.D
C. 1918 A.D
D. 2001 A.D.
8 The unit of decay constant is:
A. Second
B. Metre
C. Hour
D. Year
9 The most abundant isotope of neon is
A. neon-20
B. neon-21
C. neon-22
D. neon-23
10 The unit of decay constant is
A. sex
B. sec2
C. sec-1
D. sec-2

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