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

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

Question # 2

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

Question # 3

Alfa , beta and gamma rays are emitted from a radio-active substance

Question # 4

Proton was discovered by Rutherford in

Question # 5

When a nucleus emits an alpha particle, it atomic mass decreased by

Question # 6

Charge on proton is

Question # 7

Radium was discovered by:

Question # 8

Neutron was disvovered by:

Question # 9

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

Question # 10

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

Question # 11

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

Question # 12

Three quarks make:

Question # 13

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

Question # 14

γ-rays behave like a particle because they explain the

Question # 15

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

Question # 16

Mass of proton is of order of

Question # 17

The unit of decay constant is

Question # 18

A mass spectrograph sort out

Question # 19

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

Question # 20

Different radioactive material have

Question # 21

Neutron was discovered in

Question # 22

How many isotopes of helium are present?

Question # 23

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

Question # 24

Electrons are

Question # 25

When a nucleus emits an alpha particles, its charge number decreases by

Question # 26

The most abundant isotope of neon is

Question # 27

Radioactivity is

Question # 28

Charge on neutron is

Question # 29

Neutrons are

Question # 30

Radioactivity was discovered by:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be
A. Equal to 1
B. Less than 1
C. Greater than 1
D. Infinity
2 Mass of neutron is
A. 1.67 x 10-31kg
B. 1.67 x 10-27kg
C. 9.1 x 10-31kg
D. 1.67 x 10-19kg
3 Beta particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
4 The reciprocal of decay constant λ of a radioactive material is:
A. Frequency
B. Half life
C. Year
D. Mean life
5 Marie curie and Pierre curie discovered:
A. Uranium
B. Polonium
C. Radium
D. Both (A) and (C)
6 γ-rays are
A. electrostatic waves
B. electromagnetic waves
C. heavy particles
D. longitudinal waves
7 Maric Curie and Pieree Curie discovered two new radioactive elements, which are called
A. polonium uranium
B. uranium and radium
C. polonium and radium
D. none of these
8 The energy is found from Einstein's mass energy relation is called
A. binding energy of electron
B. binding energy of proton
C. binding energy of neutron
D. binding energy of nucleus
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 Nuclei that have the same charge number but different mass number are called
A. isotones
B. isomers
C. isotopes
D. isobars

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