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

The diameter of an atom is of the order

Question # 2

Three quarks make:

Question # 3

Charge on proton is

Question # 4

When certain nucleus emits anα particle, its mass number:

Question # 5

Examples of moderators used in a fission reactor is/are:

Question # 6

Gamma rays consist of steam of

Question # 7

The number if neutrons in the nucleus of 92U235are

Question # 8

The total charge of any nucleus is given as

Question # 9

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

Question # 10

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

Question # 11

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

Question # 12

γ-rays behave like a particle because they explain the

Question # 13

The nucleus/nuclei of hydrogen is/are:

Question # 14

In wilson cloud chamber, the air becomes saturated with:

Question # 15

Which are not the elementary particles?

Question # 16

Radioactivity

Question # 17

After alpha decay the atomic number of the atom

Question # 18

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

Question # 19

Rate of decay is actually described by.

Question # 20

The chemical properties of an element depends upon the number of

Question # 21

Nuclei that have the same charge number but different mass number are called

Question # 22

The number of all the protons and neutrons in a nucleus is known as

Question # 23

Which of the following material has longer half life

Question # 24

Electrons are

Question # 25

Structure of the nucleus was explained by

Question # 26

The rate of decay of a radioactive substance

Question # 27

The rate of decay of radioactive substance

Question # 28

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 # 29

U-238 present in the natural uranium is about:

Question # 30

The penetration power ofβ-particle is

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The nucleus left after the emission of some radiation is called:
A. Parent nucleus
B. Daughter necleus
C. Mother necleus
D. Any of these
2 The number of isotopes of hydrogen are
A. 2
B. 1
C. 3
D. 4
3 Electrons are
A. positive charged
B. negatively charged
C. massless
D. neutral
4 Radioactivity was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. All of them
5 Neutron was disvovered by:
A. Rutherford in 1920
B. Chadwick in 1922
C. Bohr in 1913
D. Compton in 1927
6 Three quarks make:
A. An electron
B. A meson
C. A baryon
D. A photon
7 In wilson cloud chamber, the air becomes saturated with:
A. Alcohol vapours
B. Water
C. Helium gas
D. Nitrogen gas
8 The distance travelled byα-particle in a medium before coming to rest, is called
A. range ofγ-particle
B. range of neutrons
C. range of particle
D. none of these
9 The diameter of an atom is of the order
A. 10-125m
B. 10-11m
C. 10-10m
D. 10-9m
10 According to Rutherford atomic model, the positive charge in an atom
A. is concentrated at its centre
B. is in the form of positive electron at same distance from its centre
C. is spread uniformly through its volume
D. none of these

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