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

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

Question # 2

Rutherford performed an experiment on nuclear reactions in:

Question # 3

A particle having the mass of electron and charge of a proton is called a

Question # 4

The distance travelled byα-particle in a medium before coming to rest, is called

Question # 5

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

Question # 6

The half life of radioactive substances depends upon

Question # 7

γ-rays are

Question # 8

Gamma rays consist of steam of

Question # 9

Beta particles are

Question # 10

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 # 11

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

Question # 12

γ-rays behave like a particle because they explain the

Question # 13

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

Question # 14

Neutron was discovered by

Question # 15

The diameter of an atom is of the order

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Neon gas have three isotopes whose atomic numbers are
A. 20, 24 , 23
B. 20, 21 , 22
C. 20, 19 , 21
D. none of these
2 Neutron was discovered by
A. Curie
B. Roentgen
C. Chadwick
D. Rutherford
3 For Protium, the mass defect is:
A. Infinite
B. Zero
C. Very large
D. A few grams
4 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
5 Fraction of the decaying atoms per unit time is called
A. decay atom
B. decay element
C. decay constant
D. decay
6 The most abundant isotope of neon is
A. neon-20
B. neon-21
C. neon-22
D. neon-23
7 The total charge of any nucleus is given as
A. Ze2
B. Z2e
C. Z/e
D. Ze
8 The penetration power ofβ-particle is
A. zero
B. less thanα-particle
C. equal toα-particle
D. greater thanα-particle
9 Heavy water is made of one oxygen atom and two atoms of:
A. Protium
B. Deuterium
C. Tritium
D. Any of these
10 The number of all the protons and neutrons in a nucleus is known as
A. atomic number
B. mass number
C. charge number
D. none of these

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