ECAT Pre Engineering Physics Chapter 21 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 21 Nuclear Physics

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Physics ECAT Pre Engineering Chapter 21 Nuclear Physics

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Question # 1

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

Question # 2

Neon gas have three isotopes whose atomic numbers are

Question # 3

Mass of proton is

Question # 4

Neutron was suggested to be in the nucleus by:

Question # 5

Neutron was discovered by

Question # 6

The chemical properties of an element depends upon the number of

Question # 7

The most abundant isotope of neon is

Question # 8

Which of the following material has smaller has life

Question # 9

Structure of the nucleus was explained by

Question # 10

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

Question # 11

Charge on proton is

Question # 12

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

Question # 13

Curie is a unit of

Question # 14

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

Question # 15

If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The half life of radioactive substances depends upon
A. amount of substance
B. energy of substance
C. state of substance
D. temperature of substance
2 The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains
A. 3 more neutrons
B. 3 more electrons
C. 3 more protons
D. 3 more ions
3 Charge on proton is
A. 1.59 x 10-9C
B. 1.59 x 10-7C
C. -1.59 x 10-19 C
D. 1.59 x 10-19C
4 Heavy water is made of one oxygen atom and two atoms of:
A. Protium
B. Deuterium
C. Tritium
D. Any of these
5 In his experiment on nuclear reactions, Rutherford bombardedα particles on:
A. Nitrogen
B. Hydrogen
C. Lead
D. Oxygen
6 Alfa , beta and gamma rays are emitted from a radio-active substance
A. spontaneously
B. when it is heated
C. when it is exposed to light
D. When it interacts with the other particle
7 Three quarks make:
A. An electron
B. A meson
C. A baryon
D. A photon
8 β-particles are easily deflected by collisions than heavy
A. α-particles
B. β-particles
C. γ-particles
D. none of these
9 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
10 When thorium nucleus emits aβ-particle, the daughter nucleus is called:
A. Protactinium
B. Actinium
C. Uranium
D. Radium

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