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

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

Question # 2

Radioactivity

Question # 3

The nuclei of an element having the same charge number but different mass numbers are called:

Question # 4

Different radioactive material have

Question # 5

Neutron was discovered by

Question # 6

γ-rays are

Question # 7

Mass of proton is

Question # 8

Mass of proton is of order of

Question # 9

Charge on neutron is

Question # 10

Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:

Question # 11

When certain nucleus emits anα particle, its mass number:

Question # 12

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

Question # 13

The rate of decay of radioactive substance

Question # 14

Radioactivity was discovered by

Question # 15

In wilson cloud chamber, the air becomes saturated with:

Question # 16

The nucleus left after the emission of some radiation is called:

Question # 17

β-particles are easily deflected by collisions than heavy

Question # 18

Alfa , beta and gamma rays are emitted from a radio-active substance

Question # 19

For Protium, the mass defect is:

Question # 20

The range of particle depends upon the factor

Question # 21

The number of isotopes of hydrogen are

Question # 22

Gamma rays consist of steam of

Question # 23

Three quarks make:

Question # 24

In 1932 Chadwick discovered

Question # 25

A curie represents a very strong source of

Question # 26

Curie is a unit of

Question # 27

The unit of decay constant is

Question # 28

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

Question # 29

Phenomenon of radioactivity is due to disintegration of

Question # 30

1 amu is equal to.

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The unit of decay constant is
A. sex
B. sec2
C. sec-1
D. sec-2
2 When a charged particle passes through matter, it produces ionization, this effect is used in
A. fission reaction
B. reactor
C. radiation detector
D. fusion reaction
3 Electrons are
A. positive charged
B. negatively charged
C. massless
D. neutral
4 The nucleus left after the emission of some radiation is called:
A. Parent nucleus
B. Daughter necleus
C. Mother necleus
D. Any of these
5 Radioactivity was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. All of them
6 A mass difference of 0.0012 u is equivalent to and energy of:
A. 0.5 Me V
B. 1.13 MeV
C. 5.13 MeV
D. 1.13 keV
7 Radioactivity is
A. self disruptive activity
B. spontaneous activity
C. exhibited by all elements under proper conditions
D. both 'a' and 'b'
8 In radio-active decay, the original element which disintegrate to another element is called
A. element
B. daughter element
C. parent element
D. none of these
9 The chemical properties of all the isotopes of an elements are
A. same
B. different
C. slightly different
D. none of these
10 In radioactive decay, the new element which is formed due to the disintegration of original element is called
A. element
B. daughter element
C. parent element
D. none of these

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