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 chemical behaviour of an atom is determined by

Question # 3

Binding energy per nucleus is

Question # 4

Neutron was discovered by

Question # 5

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

Question # 6

An alpha particle has a charge of

Question # 7

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

Question # 8

Phenomenon of radioactivity is due to disintegration of

Question # 9

Which are not the elementary particles?

Question # 10

During the nuclear changes, the law/s of conservation that hold/s are that of:

Question # 11

Alfa , beta and gamma rays are emitted from a radio-active substance

Question # 12

Pair production take place when energy ofγ-rays photon is

Question # 13

The amount of energy equivalent to 1 a.m.u is

Question # 14

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

Question # 15

Mass of neutron is

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 For an atom having atomic number Z and atomic weight A, the number of electron in an atoms
A. A - Z
B. A + Z
C. Z
D. A
2 The half life of radioactive substances depends upon
A. amount of substance
B. energy of substance
C. state of substance
D. temperature of substance
3 Alfa , beta and gamma rays are emitted from a radio-active substance
A. spontaneously
B. when it is heated
C. when it is exposed to light
D. When it interacts with the other particle
4 Structure of the nucleus was explained by
A. J.J Thomson
B. Bohr
C. Millikan
D. Rutherford
5 Charge on neutron is
A. 1.6 x 10-19C
B. zero
C. -1.6 x 10-19C
D. 1.2 x 10-19C
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 A mass spectrograph sort out
A. molecules
B. atoms
C. elements
D. isotopes
8 Pair production take place when energy ofγ-rays photon is
A. equal to 1.02 Mev-
B. greater than 1.02 Mev
C. less than 1.02 Mev
D. none of these
9 Radioactivity was discovered by
A. Rutherford
B. Henri Becqureal
C. Maxwell
D. James Chadwick
10 During the nuclear changes, the law/s of conservation that hold/s are that of:
A. Charge
B. energy
C. Momentum
D. Mass

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