ECAT Pre General Science Physics Chapter 21 MCQ Test With Answer

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

γ-rays behave like a particle because they explain the

Question # 2

For Protium, the mass defect is:

Question # 3

Three quarks make:

Question # 4

Gamma rays consist of steam of

Question # 5

For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is

Question # 6

Nucleus of a hydrogen atom may contain:

Question # 7

The range ofβ-particle in air is greater than that ofα-particle by

Question # 8

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

Question # 9

Different radioactive material have

Question # 10

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

Question # 11

The range of particle depends upon the factor

Question # 12

How many isotopes of helium are present?

Question # 13

Phenomenon of radioactivity is due to disintegration of

Question # 14

Neutron was disvovered by:

Question # 15

Neutrons are

Question # 16

Radiation detector are used to

Question # 17

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

Question # 18

β-particles are easily deflected by collisions than heavy

Question # 19

For an atom having atomic number Z and atomic weight A, the number of electron in an atoms

Question # 20

Charge on neutron is

Question # 21

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 # 22

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

Question # 23

Nuclei that have the same charge number but different mass number are called

Question # 24

The figure 1.007276μ shows the mass of an:

Question # 25

Rutherford performed an experiment on nuclear reactions in:

Question # 26

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

Question # 27

The rate of decay of radioactive substance

Question # 28

Proton was discovered by Rutherford in

Question # 29

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

Question # 30

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Nucleus consists of
A. proton and neutron
B. protons and electron
C. electron and neutron
D. protons only
2 Neutrons are
A. positive charge
B. negatively charged
C. massless
D. neutral
3 The chemical properties of all the isotopes of an elements are
A. same
B. different
C. slightly different
D. none of these
4 How much time, theα-particle more massive than an electron
A. 600
B. 7000
C. 5000
D. 15000
5 When a nucleus emits an alpha particles, its charge number decreases by
A. 3
B. 2
C. 6
D. 5
6 When a nucleus emits an alpha particle, it atomic mass decreased by
A. 2
B. 1
C. 4
D. 3
7 The unit of decay constant is
A. sex
B. sec2
C. sec-1
D. sec-2
8 The amount of energy equivalent to 1 a.m.u is
A. 9.315 Mev
B. 93.15 Mev
C. 931.5 Mev
D. 2.22 Mev
9 The isotope/s of hydrogen is /are:
A. Protium
B. Deuterium
C. Tritium
D. Both (A) and (B)
10 Mass of proton is of order of
A. 10-31gm
B. 10-27kg
C. 10-24gm
D. 10+27kg

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