ECAT Pre General Science Physics Chapter 21 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 21 Nuclear Physics

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ECAT Pre General Science Physics Chapter 21 Nuclear Physics

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Question # 1

Rutherford performed an experiment on nuclear reactions in:

Question # 2

Nucleus of a hydrogen atom may contain:

Question # 3

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

Question # 4

An alpha particle has a charge of

Question # 5

The half lie of radium-226 is

Question # 6

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

Question # 7

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 # 8

The number of protons inside a nucleus is called

Question # 9

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

Question # 10

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

Question # 11

Neutron was discovered in

Question # 12

Proton was discovered by Rutherford in

Question # 13

Radioactivity is

Question # 14

Neutrons are

Question # 15

Charge on neutron is

Question # 16

The counter, which also provides the power to the G.M. tube is called:

Question # 17

The chemical behaviour of an atom is determined by

Question # 18

The missing mass which is converted to energy in the formation of nucleus, is called

Question # 19

The unit of decay constant is:

Question # 20

1 amu is equal to

Question # 21

Fraction of the decaying atoms per unit time is called

Question # 22

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

Question # 23

The rate of decay of radioactive substance

Question # 24

Neutron was disvovered by:

Question # 25

The energy is found from Einstein's mass energy relation is called

Question # 26

For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is

Question # 27

The unit of decay constant is

Question # 28

The most abundant isotope of neon is

Question # 29

Heavy water is made of one oxygen atom and two atoms of:

Question # 30

When a nucleus emits an alpha particles, its charge number decreases by

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Structure of the nucleus was explained by
A. J.J Thomson
B. Bohr
C. Millikan
D. Rutherford
2 A particle having the mass of electron and charge of a proton is called a
A. photon
B. position
C. antiproton
D. antineutrino
3 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
4 The time required for a radioactive material to decrease in active by one half is called
A. half time
B. half life
C. disintegration time
D. mean life
5 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
6 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
7 Nucleus consists of
A. proton and neutron
B. protons and electron
C. electron and neutron
D. protons only
8 How much time, theα-particle more massive than an electron
A. 600
B. 7000
C. 5000
D. 15000
9 Curie is a unit of
A. reluctance
B. resistivity
C. binding energy
D. radioactivity
10 Which are not the elementary particles?
A. Photons
B. Leptons
C. Hadrons
D. Quarks

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