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

Neutron was suggested to be in the nucleus by:

Question # 2

The isotope/s of hydrogen is /are:

Question # 3

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

Question # 4

Radium was discovered by:

Question # 5

In 1932 Chadwick discovered

Question # 6

The number of protons inside a nucleus is called

Question # 7

Which of these is not a radiation detector

Question # 8

Which of the following material has smaller has life

Question # 9

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

Question # 10

The half lie of radium-226 is

Question # 11

Three quarks make:

Question # 12

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

Question # 13

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

Question # 14

The energy is found from Einstein's mass energy relation is called

Question # 15

Mass of proton is of order of

Question # 16

Neon gas have three isotopes whose atomic numbers are

Question # 17

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

Question # 18

β-particles are easily deflected by collisions than heavy

Question # 19

γ-rays are

Question # 20

The chemical behaviour of an atom is determined by

Question # 21

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

Question # 22

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

Question # 23

Radioactivity was discovered by

Question # 24

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

Question # 25

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

Question # 26

Phenomenon of radioactivity is due to disintegration of

Question # 27

The most abundant isotope of neon is

Question # 28

Structure of the nucleus was explained by

Question # 29

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

Question # 30

Charge on proton is

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 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
2 How much time, theα-particle more massive than an electron
A. 600
B. 7000
C. 5000
D. 15000
3 The rate of decay of radioactive substance
A. is constant
B. decrease exponentially with time
C. varies inversely as time
D. decreases linearly with time
4 Nuclei that have the same charge number but different mass number are called
A. isotones
B. isomers
C. isotopes
D. isobars
5 Beta particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
6 Curie is a unit of
A. reluctance
B. resistivity
C. binding energy
D. radioactivity
7 Radioactivity was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. All of them
8 If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by
A. -4
B. 4
C. 2
D. 1
9 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
10 Different radioactive material have
A. same half lives
B. different half lives
C. same mean lives
D. same total lives

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