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 total charge of any nucleus is given as

Question # 2

Curie is a unit of

Question # 3

Which of the following material has smaller has life

Question # 4

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

Question # 5

Gamma rays consist of steam of

Question # 6

According to Rutherford atomic model, the positive charge in an atom

Question # 7

Maric Curie and Pieree Curie discovered two new radioactive elements, which are called

Question # 8

Referring to the above figure, we can say that of all the elements, the most stable element is

Question # 9

The nucleus left after the emission of some radiation is called:

Question # 10

The chemical behaviour of an atom is determined by

Question # 11

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

Question # 12

Three quarks make:

Question # 13

The diameter of an atom is of the order

Question # 14

Mass of neutron is

Question # 15

When certain nucleus emits aβ-particles, is mass number:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The unit of decay constant is:
A. Second
B. Metre
C. Hour
D. Year
2 In 1932 Chadwick discovered
A. proton
B. neutron
C. photon
D. electron
3 Hydrogen atom with only one proton and one neutron in its nucleus, and one electron, is called
A. deuterium
B. protium
C. tritium
D. none of these
4 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
5 Which of the following material has longer half life
A. radium
B. polonium
C. radium
D. uranium
6 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
7 Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:
A. 50
B. 100
C. 150
D. 200
8 The chemical properties of all the isotopes of an elements are
A. same
B. different
C. slightly different
D. none of these
9 Nucleon means:
A. Only electrons
B. Only neutrons
C. Only protons
D. Both (A ) and (C)
10 The rate of decay of radioactive substance
A. is constant
B. decrease exponentially with time
C. varies inversely as time
D. decreases linearly with time

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