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

Which of the following material has longer half life

Question # 2

The energy acquired by a mass of 1g moving with the speed of light is

Question # 3

The most abundant isotope of neon is

Question # 4

Curie is a unit of

Question # 5

An alpha particle has a charge of

Question # 6

In wilson cloud chamber, the air becomes saturated with:

Question # 7

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

Question # 8

Marie curie and Pierre curie discovered:

Question # 9

When thorium nucleus emits aβ-particle, the daughter nucleus is called:

Question # 10

Rate of decay is actually described by.

Question # 11

Neutrons are

Question # 12

Which of the following material has smaller has life

Question # 13

Alfa particles are

Question # 14

The distance travelled byα-particle in a medium before coming to rest, is called

Question # 15

Nucleon means:

Question # 16

Three quarks make:

Question # 17

Radium was discovered by:

Question # 18

The chemical behaviour of an atom is determined by

Question # 19

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

Question # 20

Neutron was disvovered by:

Question # 21

γ-rays are

Question # 22

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

Question # 23

Charge on neutron is

Question # 24

There is present in paraffin a large amount of:

Question # 25

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

Question # 26

Structure of the nucleus was explained by

Question # 27

The unit of decay constant is:

Question # 28

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

Question # 29

U-238 present in the natural uranium is about:

Question # 30

When certain nucleus emits anα particle, its mass number:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Binding energy per nucleus is
A. greater for heavy nucleus
B. least for heavy nucleus
C. greatest for light nuclei
D. decreases for medium weight niclei
2 Neon gas have three isotopes whose atomic numbers are
A. 20, 24 , 23
B. 20, 21 , 22
C. 20, 19 , 21
D. none of these
3 According to Rutherford atomic model, the positive charge in an atom
A. is concentrated at its centre
B. is in the form of positive electron at same distance from its centre
C. is spread uniformly through its volume
D. none of these
4 Nuclei that have the same charge number but different mass number are called
A. isotones
B. isomers
C. isotopes
D. isobars
5 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
6 How much time, theα-particle more massive than an electron
A. 600
B. 7000
C. 5000
D. 15000
7 When certain nucleus emits aβ-particles, is mass number:
A. Remain same
B. Increases by one
C. Decreases by one
D. Decreases by four
8 Neutron was disvovered by:
A. Rutherford in 1920
B. Chadwick in 1922
C. Bohr in 1913
D. Compton in 1927
9 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
10 Radioactivity was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. All of them

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