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

Question # 2

The chemical behaviour of an atom is determined by

Question # 3

Charge on proton is

Question # 4

After alpha decay the atomic number of the atom

Question # 5

The rate of decay of radioactive substance

Question # 6

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

Question # 7

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

Question # 8

γ-rays are

Question # 9

Different radioactive material have

Question # 10

Fraction of the decaying atoms per unit time is called

Question # 11

The most abundant isotope of neon is

Question # 12

The counter, which also provides the power to the G.M. tube is called:

Question # 13

The number of isotopes of hydrogen are

Question # 14

Referring to the above figure, we can say that of all the elements, the most stable element is

Question # 15

The chemical properties of all the isotopes of an elements are

Question # 16

Which of the following material has longer half life

Question # 17

Neutron was suggested to be in the nucleus by:

Question # 18

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

Question # 19

The isotope/s of hydrogen is /are:

Question # 20

1 amu is equal to.

Question # 21

Binding energy per nucleus is

Question # 22

Three quarks make:

Question # 23

Neutron was discovered by

Question # 24

Curie is a unit of

Question # 25

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

Question # 26

Structure of the nucleus was explained by

Question # 27

Radioactivity

Question # 28

How much time, theα-particle more massive than an electron

Question # 29

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

Question # 30

If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by

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Sr.# Question Answer
1 Radioactivity was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. All of them
2 Gamma rays consist of steam of
A. electron
B. proton
C. photons
D. all of these
3 Fraction of the decaying atoms per unit time is called
A. decay atom
B. decay element
C. decay constant
D. decay
4 Radium was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. Rutherford
5 How many isotopes of helium are present?
A. 1
B. 2
C. 3
D. 4
6 Alfa particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
7 A curie represents a very strong source of
A. α-particle
B. β-particle
C. γ-particle
D. none of these
8 A pair of quark and antiquark makes a:
A. Meson
B. Baryon
C. Proton
D. Neutron
9 For an atom having atomic number Z and atomic weight A, the number of electron in an atoms
A. A - Z
B. A + Z
C. Z
D. A
10 When certain nucleus emits aβ-particles, is mass number:
A. Remain same
B. Increases by one
C. Decreases by one
D. Decreases by four

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