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

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

Question # 2

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

Question # 3

Gamma rays consist of steam of

Question # 4

When certain nucleus emits anα particle, its mass number:

Question # 5

Beta particles are

Question # 6

In wilson cloud chamber, the air becomes saturated with:

Question # 7

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

Question # 8

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

Question # 9

The number of protons inside a nucleus is called

Question # 10

The mass of the nucleus is always less than the total man of the protons and neutron that make up the nucleus. The difference of the two masses is called

Question # 11

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

Question # 12

Neutron was discovered by

Question # 13

γ-rays are

Question # 14

Radioactivity is

Question # 15

Neutron was disvovered by:

Question # 16

1 amu is equal to.

Question # 17

Pair production take place when energy ofγ-rays photon is

Question # 18

The nucleus/nuclei of hydrogen is/are:

Question # 19

Neutron was suggested to be in the nucleus by:

Question # 20

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

Question # 21

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

Question # 22

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

Question # 23

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

Question # 24

Nucleus consists of

Question # 25

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

Question # 26

1 amu is equal to

Question # 27

The diameter of an atom is of the order

Question # 28

An alpha particle has a charge of

Question # 29

Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:

Question # 30

Which of the following material has longer half life

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 A pair of quark and antiquark makes a:
A. Meson
B. Baryon
C. Proton
D. Neutron
2 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
3 Three quarks make:
A. An electron
B. A meson
C. A baryon
D. A photon
4 Pair production take place when energy ofγ-rays photon is
A. equal to 1.02 Mev-
B. greater than 1.02 Mev
C. less than 1.02 Mev
D. none of these
5 The number of protons inside a nucleus is called
A. mass number
B. atomic weight
C. atomic number
D. none of these
6 Nucleus consists of
A. proton and neutron
B. protons and electron
C. electron and neutron
D. protons only
7 Phenomenon of radioactivity is due to disintegration of
A. nucleus
B. neutron
C. proton
D. molecule
8 Proton was discovered by Rutherford in
A. 1915
B. 1906
C. 1910
D. 1920
9 The rate of decay of a radioactive substance
A. decrease exponentially with time
B. decreases linearly with time
C. increases linearly with time
D. increases exponentially with time
10 When radioactive nucleus emits aβ-particle, the proton-neutron ratio
A. decrease
B. increase
C. same
D. none of these

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