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

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

Question # 2

Phenomenon of radioactivity is due to disintegration of

Question # 3

The unit of decay constant is:

Question # 4

The chemical behaviour of an atom is determined by

Question # 5

The chemical properties of all the isotopes of an elements are

Question # 6

The number of isotopes of hydrogen are

Question # 7

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

Question # 8

Nucleus consists of

Question # 9

Rate of decay is actually described by.

Question # 10

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

Question # 11

Radiation detector are used to

Question # 12

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

Question # 13

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

Question # 14

Nucleon means:

Question # 15

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Radioactivity was discovered by
A. Rutherford
B. Henri Becqureal
C. Maxwell
D. James Chadwick
2 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
3 Alfa particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
4 The emission of radiations take place in elements, having charge number greater than
A. 109
B. 82
C. 69
D. 52
5 For an atom having atomic number Z and atomic weight A, the number of electron in an atoms
A. A - Z
B. A + Z
C. Z
D. A
6 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
7 The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains
A. 3 more neutrons
B. 3 more electrons
C. 3 more protons
D. 3 more ions
8 The number if neutrons in the nucleus of 92U235are
A. Infinite
B. 92
C. 235
D. 143
9 When a nucleus emits an alpha particle, it atomic mass decreased by
A. 2
B. 1
C. 4
D. 3
10 The diameter of an atom is of the order
A. 10-125m
B. 10-11m
C. 10-10m
D. 10-9m

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