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

After alpha decay the atomic number of the atom

Question # 2

Different radioactive material have

Question # 3

The number if neutrons in the nucleus of 92U235are

Question # 4

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

Question # 5

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

Question # 6

There is present in paraffin a large amount of:

Question # 7

The nucleus/nuclei of hydrogen is/are:

Question # 8

A curie represents a very strong source of

Question # 9

The chemical behaviour of an atom is determined by

Question # 10

When certain nucleus emits anα particle, its mass number:

Question # 11

Nucleus of a hydrogen atom may contain:

Question # 12

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

Question # 13

Proton was discovered by Rutherford in

Question # 14

Neutron was suggested to be in the nucleus by:

Question # 15

The number of protons inside a nucleus is called

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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 A pair of quark and antiquark makes a:
A. Meson
B. Baryon
C. Proton
D. Neutron
3 The missing mass which is converted to energy in the formation of nucleus, is called
A. packing fraction
B. mass defect
C. binding energy
D. none of these
4 The diameter of an atom is of the order
A. 10-125m
B. 10-11m
C. 10-10m
D. 10-9m
5 Which of the following material has smaller has life
A. uranium
B. polonium
C. radium
D. radian
6 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
7 Mass of proton is
A. 1.67 x 10-27kg
B. 1.67 x 10-31kg
C. 1.66 x 10-34kg
D. 1.67 x 10-17kg
8 When thorium nucleus emits aβ-particle, the daughter nucleus is called:
A. Protactinium
B. Actinium
C. Uranium
D. Radium
9 Neutrons are
A. positive charge
B. negatively charged
C. massless
D. neutral
10 Nucleon means:
A. Only electrons
B. Only neutrons
C. Only protons
D. Both (A ) and (C)

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