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

The number of protons inside a nucleus is called

Question # 2

Different radioactive material have

Question # 3

Alfa particles are

Question # 4

Radiation detector are used to

Question # 5

The unit of decay constant is:

Question # 6

When certain nucleus emits anα particle, its mass number:

Question # 7

The unit of decay constant is

Question # 8

Radioactivity is

Question # 9

The number if neutrons in the nucleus of 92U235are

Question # 10

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

Question # 11

Gamma rays consist of steam of

Question # 12

For an atom having atomic number Z and atomic weight A, the charge on the nucleus is

Question # 13

The chemical behaviour of an atom is determined by

Question # 14

A mass spectrograph sort out

Question # 15

The isotope/s of hydrogen is /are:

Question # 16

A curie represents a very strong source of

Question # 17

Charge on neutron is

Question # 18

The penetration power ofβ-particle is

Question # 19

γ-rays are

Question # 20

U-238 present in the natural uranium is about:

Question # 21

Mass of neutron is

Question # 22

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

Question # 23

The reciprocal of decay constant λ of a radioactive material is:

Question # 24

Nucleon means:

Question # 25

Proton was discovered by Rutherford in

Question # 26

The rate of decay of radioactive substance

Question # 27

Radioactivity

Question # 28

Charge on proton is

Question # 29

The half lie of radium-226 is

Question # 30

Radioactivity was discovered by

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Neutrons are
A. positive charge
B. negatively charged
C. massless
D. neutral
2 Three quarks make:
A. An electron
B. A meson
C. A baryon
D. A photon
3 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
4 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
5 The energy is found from Einstein's mass energy relation is called
A. binding energy of electron
B. binding energy of proton
C. binding energy of neutron
D. binding energy of nucleus
6 Mass of proton is
A. 1.67 x 10-27kg
B. 1.67 x 10-31kg
C. 1.66 x 10-34kg
D. 1.67 x 10-17kg
7 Electrons are
A. positive charged
B. negatively charged
C. massless
D. neutral
8 Radiation detector are used to
A. measure intensity of radiation
B. measure energy of radiation
C. difference between different types of radiation
D. all the above
9 The number if neutrons in the nucleus of 92U235are
A. Infinite
B. 92
C. 235
D. 143
10 Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:
A. 50
B. 100
C. 150
D. 200

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