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

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

Question # 2

Neutron was suggested to be in the nucleus by:

Question # 3

The penetration power ofβ-particle is

Question # 4

Nucleon means:

Question # 5

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

Question # 6

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

Question # 7

Which of the following material has longer half life

Question # 8

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

Question # 9

Charge on neutron is

Question # 10

Neutron was disvovered by:

Question # 11

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

Question # 12

The unit of decay constant is

Question # 13

The half life of uranium-238 is

Question # 14

Phenomenon of radioactivity is due to disintegration of

Question # 15

How much time, theα-particle more massive than an electron

Question # 16

A pair of quark and antiquark makes a:

Question # 17

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

Question # 18

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

Question # 19

Rutherford performed an experiment on nuclear reactions in:

Question # 20

The number if neutrons in the nucleus of 92U235are

Question # 21

The range ofβ-particle in air is greater than that ofα-particle by

Question # 22

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

Question # 23

β-particles are easily deflected by collisions than heavy

Question # 24

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

Question # 25

The chemical properties of an element depends upon the number of

Question # 26

A mass spectrograph sort out

Question # 27

The total charge of any nucleus is given as

Question # 28

The isotope/s of hydrogen is /are:

Question # 29

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

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 γ-rays behave like a particle because they explain the
A. Compton effect
B. Photoelectric effect
C. Pair-production
D. all the above
2 Neutron was disvovered by:
A. Rutherford in 1920
B. Chadwick in 1922
C. Bohr in 1913
D. Compton in 1927
3 When a nucleus emits an alpha particle, it atomic mass decreased by
A. 2
B. 1
C. 4
D. 3
4 Fraction of the decaying atoms per unit time is called
A. decay atom
B. decay element
C. decay constant
D. decay
5 Mass of proton is of order of
A. 10-31gm
B. 10-27kg
C. 10-24gm
D. 10+27kg
6 Which are not the elementary particles?
A. Photons
B. Leptons
C. Hadrons
D. Quarks
7 The energy acquired by a mass of 1g moving with the speed of light is
A. 3 x 108J
B. 9 x 1013J
C. 3 x 1013J
D. 9 x 1016J
8 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
9 The most abundant isotope of neon is
A. neon-20
B. neon-21
C. neon-22
D. neon-23
10 1 amu is equal to.
A. 1.66 x 10-24kg
B. 1.66 x 10-19kg
C. 1.66 x 10-24kg
D. 1.66 x 10-27kg

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