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

The isotope/s of hydrogen is /are:

Question # 2

γ-rays behave like a particle because they explain the

Question # 3

A mass spectrograph sort out

Question # 4

The range of particle depends upon the factor

Question # 5

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

Question # 6

The half life of uranium-238 is

Question # 7

A curie represents a very strong source of

Question # 8

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

Question # 9

Beta particles are

Question # 10

Neutrons are

Question # 11

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

Question # 12

Gamma rays consist of steam of

Question # 13

The chemical properties of all the isotopes of an elements are

Question # 14

An alpha particle has a charge of

Question # 15

The energy is found from Einstein's mass energy relation is called

Question # 16

The unit of decay constant is:

Question # 17

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

Question # 18

There is present in paraffin a large amount of:

Question # 19

The half lie of radium-226 is

Question # 20

Nucleus of a hydrogen atom may contain:

Question # 21

Three quarks make:

Question # 22

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

Question # 23

Neutron was discovered by

Question # 24

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

Question # 25

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

Question # 26

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

Question # 27

When certain nucleus emits anα particle, its mass number:

Question # 28

Marie curie and Pierre curie discovered:

Question # 29

Neutron was discovered in

Question # 30

The rate of decay of a radioactive substance

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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 unit of decay constant is
A. sex
B. sec2
C. sec-1
D. sec-2
3 How much time, theα-particle more massive than an electron
A. 600
B. 7000
C. 5000
D. 15000
4 Referring to the above figure, we can say that of all the elements, the most stable element is
A. Phosphours
B. Iron
C. uranium
D. Lithium
5 Which of the following material has smaller has life
A. uranium
B. polonium
C. radium
D. radian
6 The nucleus left after the emission of some radiation is called:
A. Parent nucleus
B. Daughter necleus
C. Mother necleus
D. Any of these
7 The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains
A. 3 more neutrons
B. 3 more electrons
C. 3 more protons
D. 3 more ions
8 The reciprocal of decay constant λ of a radioactive material is:
A. Frequency
B. Half life
C. Year
D. Mean life
9 The total charge of any nucleus is given as
A. Ze2
B. Z2e
C. Z/e
D. Ze
10 The rate of decay of a radioactive substance
A. decrease exponentially with time
B. decreases linearly with time
C. increases linearly with time
D. increases exponentially with time

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