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

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

Question # 2

The penetration power ofβ-particle is

Question # 3

The diameter of an atom is of the order

Question # 4

Marie curie and Pierre curie discovered:

Question # 5

If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by

Question # 6

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

Question # 7

Phenomenon of radioactivity is due to disintegration of

Question # 8

Radioactivity is

Question # 9

The number of protons inside a nucleus is called

Question # 10

The chemical properties of all the isotopes of an elements are

Question # 11

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

Question # 12

Curie is a unit of

Question # 13

In radioactive decay, the new element which is formed due to the disintegration of original element is called

Question # 14

Nuclei that have the same charge number but different mass number are called

Question # 15

Neutrons are

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Maric Curie and Pieree Curie discovered two new radioactive elements, which are called
A. polonium uranium
B. uranium and radium
C. polonium and radium
D. none of these
2 Which of these is not a radiation detector
A. Wilson cloud chamber
B. cyclotron acceleration
C. Geiger Miller counter
D. solid state detector
3 Phenomenon of radioactivity is due to disintegration of
A. nucleus
B. neutron
C. proton
D. molecule
4 The half lie of radium-226 is
A. 238 years
B. 4.5 x 109days
C. 1620 years
D. 332 years
5 Rutherford performed an experiment on nuclear reactions in:
A. 1718 A.D
B. 1818 A.D
C. 1918 A.D
D. 2001 A.D.
6 The range ofβ-particle in air is greater than that ofα-particle by
A. 1000 times
B. 100 times
C. 15 times
D. 10 times
7 The chemical properties of all the isotopes of an elements are
A. same
B. different
C. slightly different
D. none of these
8 In 1932 Chadwick discovered
A. proton
B. neutron
C. photon
D. electron
9 If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by
A. -4
B. 4
C. 2
D. 1
10 Fraction of the decaying atoms per unit time is called
A. decay atom
B. decay element
C. decay constant
D. decay

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