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

Gamma rays consist of steam of

Question # 2

The mass of the nucleus is always less than the total man of the protons and neutron that make up the nucleus. The difference of the two masses is called

Question # 3

When radioactive nucleus emits aβ-particle, the proton-neutron ratio

Question # 4

The range of particle depends upon the factor

Question # 5

Rutherford performed an experiment on nuclear reactions in:

Question # 6

The half life of uranium-238 is

Question # 7

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

Question # 8

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 # 9

The chemical properties of all the isotopes of an elements are

Question # 10

The number if neutrons in the nucleus of 92U235are

Question # 11

Binding energy per nucleus is

Question # 12

Marie curie and Pierre curie discovered:

Question # 13

When a nucleus emits an alpha particle, it atomic mass decreased by

Question # 14

How many isotopes of helium are present?

Question # 15

The emission of radiations take place in elements, having charge number greater than

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 A mass spectrograph sort out
A. molecules
B. atoms
C. elements
D. isotopes
2 When certain nucleus emits anα particle, its mass number:
A. Increases by one
B. Decreases by one
C. Remain same
D. Decreases by four
3 Radioactivity
A. is exhibited more by semiconductors in general
B. in exhibited more by the element when they are coupled
C. with other radioactive elements by a covalent bond
D. is an atomic property of radioactive elements
4 A pair of quark and antiquark makes a:
A. Meson
B. Baryon
C. Proton
D. Neutron
5 Marie curie and Pierre curie discovered:
A. Uranium
B. Polonium
C. Radium
D. Both (A) and (C)
6 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
7 The counter, which also provides the power to the G.M. tube is called:
A. Thin mica window
B. thin glass window
C. Airy window
D. Wooden window
8 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
9 The number of isotopes of hydrogen are
A. 2
B. 1
C. 3
D. 4
10 In 1932 Chadwick discovered
A. proton
B. neutron
C. photon
D. electron

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