ECAT Pre Engineering Physics Chapter 21 MCQ Test With Answer

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

Try The 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

1 amu is equal to

Question # 2

Examples of moderators used in a fission reactor is/are:

Question # 3

Beta particles are

Question # 4

When thorium nucleus emits aβ-particle, the daughter nucleus is called:

Question # 5

The chemical properties of an element depends upon the number of

Question # 6

Binding energy per nucleus is

Question # 7

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

Question # 8

Fraction of the decaying atoms per unit time is called

Question # 9

Phenomenon of radioactivity is due to disintegration of

Question # 10

How many isotopes of helium are present?

Question # 11

γ-rays behave like a particle because they explain the

Question # 12

In 1932 Chadwick discovered

Question # 13

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

Question # 14

Radioactivity was discovered by:

Question # 15

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 How much time, theα-particle more massive than an electron
A. 600
B. 7000
C. 5000
D. 15000
2 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
A. nuclear fission
B. nuclear fusion
C. man defect
D. radioactivity
3 Which are not the elementary particles?
A. Photons
B. Leptons
C. Hadrons
D. Quarks
4 Nucleus of a hydrogen atom may contain:
A. One neutron only
B. Two protons and one neutron
C. Two protons and two neutrons
D. Aany of above
5 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
6 The most abundant isotope of neon is
A. neon-20
B. neon-21
C. neon-22
D. neon-23
7 Neutron was disvovered by:
A. Rutherford in 1920
B. Chadwick in 1922
C. Bohr in 1913
D. Compton in 1927
8 Neutrons are
A. positive charge
B. negatively charged
C. massless
D. neutral
9 Examples of moderators used in a fission reactor is/are:
A. Water
B. Heavy water
C. Carbon
D. Hydrocarbon
10 Radioactivity is
A. self disruptive activity
B. spontaneous activity
C. exhibited by all elements under proper conditions
D. both 'a' and 'b'

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  • alishba rasheed

    alishba rasheed

    03 Mar 2018

    easy mcqs

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