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

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

Question # 2

The half lie of radium-226 is

Question # 3

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

Question # 4

There is present in paraffin a large amount of:

Question # 5

When certain nucleus emits anα particle, its mass number:

Question # 6

Neon gas have three isotopes whose atomic numbers are

Question # 7

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

Question # 8

Structure of the nucleus was explained by

Question # 9

An alpha particle has a charge of

Question # 10

Radioactivity was discovered by:

Question # 11

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

Question # 12

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

Question # 13

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

Question # 14

The half life of uranium-238 is

Question # 15

β-particles are easily deflected by collisions than heavy

Question # 16

The half life of radioactive substances depends upon

Question # 17

Alfa particles are

Question # 18

Electrons are

Question # 19

The time required for a radioactive material to decrease in active by one half is called

Question # 20

The diameter of an atom is of the order

Question # 21

Curie is a unit of

Question # 22

Beta particles are

Question # 23

Rutherford performed an experiment on nuclear reactions in:

Question # 24

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

Question # 25

The chemical properties of an element depends upon the number of

Question # 26

The number of isotopes of hydrogen are

Question # 27

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

Question # 28

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

Question # 29

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

Question # 30

Mass of proton is

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 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
2 The number if neutrons in the nucleus of 92U235are
A. Infinite
B. 92
C. 235
D. 143
3 The penetration power ofβ-particle is
A. zero
B. less thanα-particle
C. equal toα-particle
D. greater thanα-particle
4 Electrons are
A. positive charged
B. negatively charged
C. massless
D. neutral
5 Which of these is not a radiation detector
A. Wilson cloud chamber
B. cyclotron acceleration
C. Geiger Miller counter
D. solid state detector
6 Marie curie and Pierre curie discovered:
A. Uranium
B. Polonium
C. Radium
D. Both (A) and (C)
7 Binding energy per nucleus is
A. greater for heavy nucleus
B. least for heavy nucleus
C. greatest for light nuclei
D. decreases for medium weight niclei
8 The reciprocal of decay constant λ of a radioactive material is:
A. Frequency
B. Half life
C. Year
D. Mean life
9 The chemical properties of an element depends upon the number of
A. electron
B. position
C. photons
D. neutrons
10 The isotope/s of hydrogen is /are:
A. Protium
B. Deuterium
C. Tritium
D. Both (A) and (B)

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