ECAT Pre Computer Science Chapter 21 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 21 Nuclear Physics

Try The MCQ's Test For ECAT Physics Chapter 21 Nuclear Physics

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ECAT Physics Chapter 21 Nuclear Physics

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Question # 1

U-238 present in the natural uranium is about:

Question # 2

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

Question # 3

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

Question # 4

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

Question # 5

The chemical behaviour of an atom is determined by

Question # 6

Alfa particles are

Question # 7

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

Question # 8

In radioactive decay, the new element which is formed due to the disintegration of original element is called

Question # 9

Mass of proton is of order of

Question # 10

The unit of decay constant is

Question # 11

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

Question # 12

For Protium, the mass defect is:

Question # 13

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

Question # 14

Electrons are

Question # 15

A mass spectrograph sort out

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The rate of decay of a radioactive substance
A. decrease exponentially with time
B. decreases linearly with time
C. increases linearly with time
D. increases exponentially with time
2 Radium was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. Rutherford
3 Phenomenon of radioactivity is due to disintegration of
A. nucleus
B. neutron
C. proton
D. molecule
4 The number of isotopes of hydrogen are
A. 2
B. 1
C. 3
D. 4
5 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
6 Alfa particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
7 In radio-active decay, the original element which disintegrate to another element is called
A. element
B. daughter element
C. parent element
D. none of these
8 Neutron was discovered in
A. 1915
B. 1920
C. 1925
D. 1932
9 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
10 Fraction of the decaying atoms per unit time is called
A. decay atom
B. decay element
C. decay constant
D. decay

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