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

β-particles are easily deflected by collisions than heavy

Question # 2

The rate of decay of a radioactive substance

Question # 3

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

Question # 4

Rate of decay is actually described by.

Question # 5

Which of the following material has longer half life

Question # 6

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

Question # 7

Neutron was discovered by

Question # 8

Charge on proton is

Question # 9

Electrons are

Question # 10

The amount of energy equivalent to 1 a.m.u is

Question # 11

The energy acquired by a mass of 1g moving with the speed of light is

Question # 12

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

Question # 13

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

Question # 14

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

Question # 15

Mass of neutron is

Question # 16

The most abundant isotope of neon is

Question # 17

Gamma rays consist of steam of

Question # 18

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

Question # 19

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

Question # 20

The chemical properties of an element depends upon the number of

Question # 21

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

Question # 22

Radioactivity was discovered by

Question # 23

Nucleon means:

Question # 24

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

Question # 25

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

Question # 26

The isotope/s of hydrogen is /are:

Question # 27

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 # 28

The unit of decay constant is:

Question # 29

An alpha particle has a charge of

Question # 30

Nucleus of a hydrogen atom may contain:

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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 Radioactivity was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. All of them
3 During the nuclear changes, the law/s of conservation that hold/s are that of:
A. Charge
B. energy
C. Momentum
D. Mass
4 When thorium nucleus emits aβ-particle, the daughter nucleus is called:
A. Protactinium
B. Actinium
C. Uranium
D. Radium
5 The penetration power ofβ-particle is
A. zero
B. less thanα-particle
C. equal toα-particle
D. greater thanα-particle
6 Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called
A. deuteron
B. deterium
C. protium
D. tritium
7 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
8 1 amu is equal to.
A. 1.66 x 10-24kg
B. 1.66 x 10-19kg
C. 1.66 x 10-24kg
D. 1.66 x 10-27kg
9 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
10 Alfa particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons

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