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

Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:

Question # 2

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

Question # 3

1 amu is equal to.

Question # 4

The distance travelled byα-particle in a medium before coming to rest, is called

Question # 5

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

Question # 6

γ-rays behave like a particle because they explain the

Question # 7

Radiation detector are used to

Question # 8

The half life of radioactive substances depends upon

Question # 9

The number of protons inside a nucleus is called

Question # 10

A curie represents a very strong source of

Question # 11

Mass of proton is of order of

Question # 12

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

Question # 13

The nucleus/nuclei of hydrogen is/are:

Question # 14

During the nuclear changes, the law/s of conservation that hold/s are that of:

Question # 15

Electrons are

Question # 16

The counter, which also provides the power to the G.M. tube is called:

Question # 17

The unit of decay constant is:

Question # 18

Structure of the nucleus was explained by

Question # 19

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

Question # 20

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

Question # 21

The diameter of an atom is of the order

Question # 22

The half life of uranium-238 is

Question # 23

According to Rutherford atomic model, the positive charge in an atom

Question # 24

An alpha particle has a charge of

Question # 25

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

Question # 26

The range of particle depends upon the factor

Question # 27

When certain nucleus emits anα particle, its mass number:

Question # 28

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

Question # 29

Rate of decay is actually described by.

Question # 30

In 1932 Chadwick discovered

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 For Protium, the mass defect is:
A. Infinite
B. Zero
C. Very large
D. A few grams
2 Marie curie and Pierre curie discovered:
A. Uranium
B. Polonium
C. Radium
D. Both (A) and (C)
3 Nucleus consists of
A. proton and neutron
B. protons and electron
C. electron and neutron
D. protons only
4 Three quarks make:
A. An electron
B. A meson
C. A baryon
D. A photon
5 The missing mass which is converted to energy in the formation of nucleus, is called
A. packing fraction
B. mass defect
C. binding energy
D. none of these
6 Curie is a unit of
A. reluctance
B. resistivity
C. binding energy
D. radioactivity
7 The unit of decay constant is
A. sex
B. sec2
C. sec-1
D. sec-2
8 The range of particle depends upon the factor
A. charge, mass and energy of particle
B. density of medium
C. ionization potential of the atoms
D. all the above
9 The diameter of an atom is of the order
A. 10-125m
B. 10-11m
C. 10-10m
D. 10-9m
10 The number of all the protons and neutrons in a nucleus is known as
A. atomic number
B. mass number
C. charge number
D. none of these

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