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

Rate of decay is actually described by.

Question # 2

Which of these is not a radiation detector

Question # 3

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

Question # 4

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

Question # 5

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

Question # 6

Radiation detector are used to

Question # 7

Neutron was discovered in

Question # 8

When certain nucleus emits aβ-particles, is mass number:

Question # 9

Beta particles are

Question # 10

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

Question # 11

For Protium, the mass defect is:

Question # 12

The diameter of an atom is of the order

Question # 13

Nucleon means:

Question # 14

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

Question # 15

Curie is a unit of

Question # 16

Referring to the above figure, we can say that of all the elements, the most stable element is

Question # 17

Radioactivity is

Question # 18

If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be

Question # 19

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

Question # 20

The total charge of any nucleus is given as

Question # 21

The chemical properties of an element depends upon the number of

Question # 22

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

Question # 23

Neutron was suggested to be in the nucleus by:

Question # 24

Which are not the elementary particles?

Question # 25

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

Question # 26

Different radioactive material have

Question # 27

Neon gas have three isotopes whose atomic numbers are

Question # 28

γ-rays behave like a particle because they explain the

Question # 29

Neutrons are

Question # 30

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 According to Rutherford atomic model, the positive charge in an atom
A. is concentrated at its centre
B. is in the form of positive electron at same distance from its centre
C. is spread uniformly through its volume
D. none of these
2 When a nucleus emits an alpha particles, its charge number decreases by
A. 3
B. 2
C. 6
D. 5
3 A mass difference of 0.0012 u is equivalent to and energy of:
A. 0.5 Me V
B. 1.13 MeV
C. 5.13 MeV
D. 1.13 keV
4 The range ofβ-particle in air is greater than that ofα-particle by
A. 1000 times
B. 100 times
C. 15 times
D. 10 times
5 The nucleus/nuclei of hydrogen is/are:
A. Proton
B. Deuteron
C. Triton
D. All of these
6 Examples of moderators used in a fission reactor is/are:
A. Water
B. Heavy water
C. Carbon
D. Hydrocarbon
7 Curie is a unit of
A. reluctance
B. resistivity
C. binding energy
D. radioactivity
8 The half life of uranium-238 is
A. 6.2 x 109years
B. 4.5 x 109days
C. 4.5 x 109years
D. 1.3 x 106years
9 The chemical properties of all the isotopes of an elements are
A. same
B. different
C. slightly different
D. none of these
10 The nucleus left after the emission of some radiation is called:
A. Parent nucleus
B. Daughter necleus
C. Mother necleus
D. Any of these

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