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

There is present in paraffin a large amount of:

Question # 2

The rate of decay of radioactive substance

Question # 3

After alpha decay the atomic number of the atom

Question # 4

Mass of proton is

Question # 5

Phenomenon of radioactivity is due to disintegration of

Question # 6

Rutherford performed an experiment on nuclear reactions in:

Question # 7

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

Question # 8

Beta particles are

Question # 9

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

Question # 10

γ-rays are

Question # 11

When certain nucleus emits anα particle, its mass number:

Question # 12

Nucleus consists of

Question # 13

Which are not the elementary particles?

Question # 14

The most abundant isotope of neon is

Question # 15

In his experiment on nuclear reactions, Rutherford bombardedα particles on:

Question # 16

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

Question # 17

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

Question # 18

Different radioactive material have

Question # 19

When a nucleus emits an alpha particles, its charge number decreases by

Question # 20

Curie is a unit of

Question # 21

The chemical properties of all the isotopes of an elements are

Question # 22

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

Question # 23

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

Question # 24

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 # 25

Nucleon means:

Question # 26

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

Question # 27

Radioactivity is

Question # 28

Gamma rays consist of steam of

Question # 29

Alfa particles are

Question # 30

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The number of isotopes of hydrogen are
A. 2
B. 1
C. 3
D. 4
2 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
3 The number of protons inside a nucleus is called
A. mass number
B. atomic weight
C. atomic number
D. none of these
4 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
5 For Protium, the mass defect is:
A. Infinite
B. Zero
C. Very large
D. A few grams
6 When radioactive nucleus emits aβ-particle, the proton-neutron ratio
A. decrease
B. increase
C. same
D. none of these
7 The isotope/s of hydrogen is /are:
A. Protium
B. Deuterium
C. Tritium
D. Both (A) and (B)
8 Curie is a unit of
A. reluctance
B. resistivity
C. binding energy
D. radioactivity
9 The rate of decay of radioactive substance
A. is constant
B. decrease exponentially with time
C. varies inversely as time
D. decreases linearly with time
10 Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:
A. 50
B. 100
C. 150
D. 200

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