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

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Question # 1

Radioactivity was discovered by

Question # 2

When certain nucleus emits aβ-particles, is mass number:

Question # 3

The unit of decay constant is

Question # 4

1 amu is equal to.

Question # 5

The chemical properties of an element depends upon the number of

Question # 6

The penetration power ofβ-particle is

Question # 7

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

Question # 8

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

Question # 9

Mass of proton is

Question # 10

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

Question # 11

Different radioactive material have

Question # 12

When radioactive nucleus emits aβ-particle, the proton-neutron ratio

Question # 13

An alpha particle has a charge of

Question # 14

Radium was discovered by:

Question # 15

In 1932 Chadwick discovered

Question # 16

The rate of decay of a radioactive substance

Question # 17

There is present in paraffin a large amount of:

Question # 18

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

Question # 19

1 amu is equal to

Question # 20

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

Question # 21

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

Question # 22

In radioactive decay, the new element which is formed due to the disintegration of original element is called

Question # 23

The diameter of an atom is of the order

Question # 24

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

Question # 25

The nucleus/nuclei of hydrogen is/are:

Question # 26

Radioactivity is

Question # 27

Neutron was discovered in

Question # 28

Three quarks make:

Question # 29

How many isotopes of helium are present?

Question # 30

For an atom having atomic number Z and atomic weight A, the charge on the nucleus is

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The reciprocal of decay constant λ of a radioactive material is:
A. Frequency
B. Half life
C. Year
D. Mean life
2 Radioactivity is
A. self disruptive activity
B. spontaneous activity
C. exhibited by all elements under proper conditions
D. both 'a' and 'b'
3 The chemical properties of an element depends upon the number of
A. electron
B. position
C. photons
D. neutrons
4 When a nucleus emits an alpha particles, its charge number decreases by
A. 3
B. 2
C. 6
D. 5
5 Neutron was suggested to be in the nucleus by:
A. Rutherford in 1920
B. Bohar in 1913
C. Dirac in 1928
D. Anderson in 1932
6 The emission of radiations take place in elements, having charge number greater than
A. 109
B. 82
C. 69
D. 52
7 The half life of radioactive substances depends upon
A. amount of substance
B. energy of substance
C. state of substance
D. temperature of substance
8 The unit of decay constant is:
A. Second
B. Metre
C. Hour
D. Year
9 Curie is a unit of
A. reluctance
B. resistivity
C. binding energy
D. radioactivity
10 The unit of decay constant is
A. sex
B. sec2
C. sec-1
D. sec-2

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