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

In radio-active decay, the original element which disintegrate to another element is called

Question # 2

The unit of decay constant is

Question # 3

The half life of radioactive substances depends upon

Question # 4

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

Question # 5

The total charge of any nucleus is given as

Question # 6

Heavy water is made of one oxygen atom and two atoms of:

Question # 7

Binding energy per nucleus is

Question # 8

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

Question # 9

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

Question # 10

The nucleus/nuclei of hydrogen is/are:

Question # 11

The number if neutrons in the nucleus of 92U235are

Question # 12

Mass of neutron is

Question # 13

1 amu is equal to

Question # 14

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

Question # 15

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

Question # 16

Proton was discovered by Rutherford in

Question # 17

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

Question # 18

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

Question # 19

The penetration power ofβ-particle is

Question # 20

In 1932 Chadwick discovered

Question # 21

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

Question # 22

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

Question # 23

Charge on proton is

Question # 24

β-particles are easily deflected by collisions than heavy

Question # 25

Charge on neutron is

Question # 26

Alfa particles are

Question # 27

The unit of decay constant is:

Question # 28

Radioactivity was discovered by:

Question # 29

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

Question # 30

Marie curie and Pierre curie discovered:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 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
2 Nucleus consists of
A. proton and neutron
B. protons and electron
C. electron and neutron
D. protons only
3 Phenomenon of radioactivity is due to disintegration of
A. nucleus
B. neutron
C. proton
D. molecule
4 U-238 present in the natural uranium is about:
A. 59%
B. 0.007%
C. 99%
D. 39%
5 Which of the following material has longer half life
A. radium
B. polonium
C. radium
D. uranium
6 When a charged particle passes through matter, it produces ionization, this effect is used in
A. fission reaction
B. reactor
C. radiation detector
D. fusion reaction
7 Radioactivity is
A. self disruptive activity
B. spontaneous activity
C. exhibited by all elements under proper conditions
D. both 'a' and 'b'
8 After alpha decay the atomic number of the atom
A. increase by four
B. decreases by two
C. increases by two
D. decrease by four
9 Nucleon means:
A. Only electrons
B. Only neutrons
C. Only protons
D. Both (A ) and (C)
10 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

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