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

Radioactivity was discovered by

Question # 2

1 amu is equal to.

Question # 3

The unit of decay constant is:

Question # 4

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

Question # 5

How many isotopes of helium are present?

Question # 6

Neutron was suggested to be in the nucleus by:

Question # 7

The figure 1.007276μ shows the mass of an:

Question # 8

In his experiment on nuclear reactions, Rutherford bombardedα particles on:

Question # 9

A mass spectrograph sort out

Question # 10

The total charge of any nucleus is given as

Question # 11

Heavy water is made of one oxygen atom and two atoms of:

Question # 12

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

Question # 13

Beta particles are

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Electrons are
A. positive charged
B. negatively charged
C. massless
D. neutral
2 The isotope/s of hydrogen is /are:
A. Protium
B. Deuterium
C. Tritium
D. Both (A) and (B)
3 The number if neutrons in the nucleus of 92U235are
A. Infinite
B. 92
C. 235
D. 143
4 Marie curie and Pierre curie discovered:
A. Uranium
B. Polonium
C. Radium
D. Both (A) and (C)
5 The most abundant isotope of neon is
A. neon-20
B. neon-21
C. neon-22
D. neon-23
6 The half life of uranium-238 is
A. 6.2 x 109years
B. 4.5 x 109days
C. 4.5 x 109years
D. 1.3 x 106years
7 The unit of decay constant is:
A. Second
B. Metre
C. Hour
D. Year
8 The reciprocal of decay constant λ of a radioactive material is:
A. Frequency
B. Half life
C. Year
D. Mean life
9 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
A. nuclear fission
B. nuclear fusion
C. man defect
D. radioactivity
10 Radioactivity
A. is exhibited more by semiconductors in general
B. in exhibited more by the element when they are coupled
C. with other radioactive elements by a covalent bond
D. is an atomic property of radioactive elements

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