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

In radio-active decay, the original element which disintegrate to another element is called

Question # 2

Mass of proton is

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

Electrons are

Question # 5

The diameter of an atom is of the order

Question # 6

Nucleon means:

Question # 7

The unit of decay constant is

Question # 8

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 # 9

Radioactivity is

Question # 10

The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains

Question # 11

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

Question # 12

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

Question # 13

Gamma rays consist of steam of

Question # 14

An alpha particle has a charge of

Question # 15

Alfa particles are

Question # 16

The penetration power ofβ-particle is

Question # 17

Which of the following material has longer half life

Question # 18

Nucleus of a hydrogen atom may contain:

Question # 19

Charge on neutron is

Question # 20

Mass of proton is of order of

Question # 21

Which are not the elementary particles?

Question # 22

The half life of radioactive substances depends upon

Question # 23

Pair production take place when energy ofγ-rays photon is

Question # 24

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

Question # 25

How many isotopes of helium are present?

Question # 26

There is present in paraffin a large amount of:

Question # 27

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

Question # 28

Beta particles are

Question # 29

For Protium, the mass defect is:

Question # 30

The chemical properties of an element depends upon the number of

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The isotope/s of hydrogen is /are:
A. Protium
B. Deuterium
C. Tritium
D. Both (A) and (B)
2 Hydrogen atom with only one proton and one neutron in its nucleus, and one electron, is called
A. deuterium
B. protium
C. tritium
D. none of these
3 1 amu is equal to
A. 1.66 x 10-24kg
B. 1.66 x 10-19kg
C. 1.66 x 10-34kg
D. 1.66 x 10-27kg
4 Rutherford performed an experiment on nuclear reactions in:
A. 1718 A.D
B. 1818 A.D
C. 1918 A.D
D. 2001 A.D.
5 Neutron was suggested to be in the nucleus by:
A. Rutherford in 1920
B. Bohar in 1913
C. Dirac in 1928
D. Anderson in 1932
6 The number if neutrons in the nucleus of 92U235are
A. Infinite
B. 92
C. 235
D. 143
7 Neon gas have three isotopes whose atomic numbers are
A. 20, 24 , 23
B. 20, 21 , 22
C. 20, 19 , 21
D. none of these
8 γ-rays are
A. electrostatic waves
B. electromagnetic waves
C. heavy particles
D. longitudinal waves
9 The nuclei of an element having the same charge number but different mass numbers are called:
A. Isobars
B. Isotopes
C. Isomers
D. Isobaric
10 β-particles are easily deflected by collisions than heavy
A. α-particles
B. β-particles
C. γ-particles
D. none of these

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