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

For an atom having atomic number Z and atomic weight A, the number of electron in an atoms

Question # 2

The number of all the protons and neutrons in a nucleus is known as

Question # 3

The chemical properties of all the isotopes of an elements are

Question # 4

In radio-active decay, the original element which disintegrate to another element is called

Question # 5

Nucleus of a hydrogen atom may contain:

Question # 6

1 amu is equal to

Question # 7

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

Question # 8

The number if neutrons in the nucleus of 92U235are

Question # 9

Rate of decay is actually described by.

Question # 10

Mass of proton is of order of

Question # 11

In his experiment on nuclear reactions, Rutherford bombardedα particles on:

Question # 12

How many isotopes of helium are present?

Question # 13

The half lie of radium-226 is

Question # 14

A mass difference of 0.0012 u is equivalent to and energy of:

Question # 15

The time required for a radioactive material to decrease in active by one half is called

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Marie curie and Pierre curie discovered:
A. Uranium
B. Polonium
C. Radium
D. Both (A) and (C)
2 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
3 Neutron was discovered in
A. 1915
B. 1920
C. 1925
D. 1932
4 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
5 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
6 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
7 Nuclei that have the same charge number but different mass number are called
A. isotones
B. isomers
C. isotopes
D. isobars
8 The energy is found from Einstein's mass energy relation is called
A. binding energy of electron
B. binding energy of proton
C. binding energy of neutron
D. binding energy of nucleus
9 Fraction of the decaying atoms per unit time is called
A. decay atom
B. decay element
C. decay constant
D. decay
10 Nucleus of a hydrogen atom may contain:
A. One neutron only
B. Two protons and one neutron
C. Two protons and two neutrons
D. Aany of above

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