ECAT Pre General Science Physics Chapter 21 MCQ Test With Answer

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

Try The 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

00:00
Question # 1

Curie is a unit of

Question # 2

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

Question # 3

Beta particles are

Question # 4

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

Question # 5

The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains

Question # 6

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

Question # 7

The half lie of radium-226 is

Question # 8

Neutron was suggested to be in the nucleus by:

Question # 9

Radioactivity was discovered by:

Question # 10

Alfa particles are

Question # 11

Three quarks make:

Question # 12

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

Question # 13

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

Question # 14

Radioactivity

Question # 15

The half life of radioactive substances depends upon

Question # 16

The reciprocal of decay constant λ of a radioactive material is:

Question # 17

Nucleon means:

Question # 18

Neutrons are

Question # 19

Pair production take place when energy ofγ-rays photon is

Question # 20

The most abundant isotope of neon is

Question # 21

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

Question # 22

Mass of neutron is

Question # 23

The number of isotopes of hydrogen are

Question # 24

Which of the following material has smaller has life

Question # 25

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

Question # 26

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

Question # 27

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 # 28

The total charge of any nucleus is given as

Question # 29

Charge on neutron is

Question # 30

In 1932 Chadwick discovered

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Neutron was discovered by
A. Curie
B. Roentgen
C. Chadwick
D. Rutherford
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 When radioactive nucleus emits aβ-particle, the proton-neutron ratio
A. decrease
B. increase
C. same
D. none of these
4 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
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 Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:
A. 50
B. 100
C. 150
D. 200
7 Proton was discovered by Rutherford in
A. 1915
B. 1906
C. 1910
D. 1920
8 For an atom having atomic number Z and atomic weight A, the charge on the nucleus is
A. A - Z
B. A + Z
C. Z
D. A
9 During the nuclear changes, the law/s of conservation that hold/s are that of:
A. Charge
B. energy
C. Momentum
D. Mass
10 The nucleus left after the emission of some radiation is called:
A. Parent nucleus
B. Daughter necleus
C. Mother necleus
D. Any of these

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