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

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

Question # 2

The half lie of radium-226 is

Question # 3

The chemical properties of an element depends upon the number of

Question # 4

A curie represents a very strong source of

Question # 5

The reciprocal of decay constant λ of a radioactive material is:

Question # 6

Proton was discovered by Rutherford in

Question # 7

The half life of radioactive substances depends upon

Question # 8

When thorium nucleus emits aβ-particle, the daughter nucleus is called:

Question # 9

In 1932 Chadwick discovered

Question # 10

Which of these is not a radiation detector

Question # 11

Radioactivity was discovered by

Question # 12

An alpha particle has a charge of

Question # 13

When a charged particle passes through matter, it produces ionization, this effect is used in

Question # 14

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

Question # 15

Phenomenon of radioactivity is due to disintegration of

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 When a nucleus emits an alpha particle, it atomic mass decreased by
A. 2
B. 1
C. 4
D. 3
2 According to Rutherford atomic model, the positive charge in an atom
A. is concentrated at its centre
B. is in the form of positive electron at same distance from its centre
C. is spread uniformly through its volume
D. none of these
3 When radioactive nucleus emits aβ-particle, the proton-neutron ratio
A. decrease
B. increase
C. same
D. none of these
4 Nucleus of a hydrogen atom may contain:
A. One neutron only
B. Two protons and one neutron
C. Two protons and two neutrons
D. Aany of above
5 Referring to the above figure, we can say that of all the elements, the most stable element is
A. Phosphours
B. Iron
C. uranium
D. Lithium
6 The time required for a radioactive material to decrease in active by one half is called
A. half time
B. half life
C. disintegration time
D. mean life
7 The chemical behaviour of an atom is determined by
A. binding energy
B. atomic number
C. mass number
D. number of isotopes
8 Nucleon means:
A. Only electrons
B. Only neutrons
C. Only protons
D. Both (A ) and (C)
9 Radioactivity was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. All of them
10 Heavy water is made of one oxygen atom and two atoms of:
A. Protium
B. Deuterium
C. Tritium
D. Any of these

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