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 chemical properties of an element depends upon the number of

Question # 2

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

Question # 3

Maric Curie and Pieree Curie discovered two new radioactive elements, which are called

Question # 4

Structure of the nucleus was explained by

Question # 5

Neutron was discovered in

Question # 6

In wilson cloud chamber, the air becomes saturated with:

Question # 7

Charge on proton is

Question # 8

The half lie of radium-226 is

Question # 9

Radioactivity

Question # 10

The number of isotopes of hydrogen are

Question # 11

Three quarks make:

Question # 12

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

Question # 13

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

Question # 14

When certain nucleus emits aβ-particles, is mass number:

Question # 15

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

Question # 16

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

Question # 17

Nucleus of a hydrogen atom may contain:

Question # 18

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

Question # 19

Proton was discovered by Rutherford in

Question # 20

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

Question # 21

The nucleus/nuclei of hydrogen is/are:

Question # 22

How many isotopes of helium are present?

Question # 23

Radioactivity was discovered by

Question # 24

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

Question # 25

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

Question # 26

Phenomenon of radioactivity is due to disintegration of

Question # 27

Gamma rays consist of steam of

Question # 28

A particle having the mass of electron and charge of a proton is called a

Question # 29

The total charge of any nucleus is given as

Question # 30

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Examples of moderators used in a fission reactor is/are:
A. Water
B. Heavy water
C. Carbon
D. Hydrocarbon
2 Mass of proton is of order of
A. 10-31gm
B. 10-27kg
C. 10-24gm
D. 10+27kg
3 The most abundant isotope of neon is
A. neon-20
B. neon-21
C. neon-22
D. neon-23
4 The chemical behaviour of an atom is determined by
A. binding energy
B. atomic number
C. mass number
D. number of isotopes
5 When radioactive nucleus emits aβ-particle, the proton-neutron ratio
A. decrease
B. increase
C. same
D. none of these
6 Neutrons are
A. positive charge
B. negatively charged
C. massless
D. neutral
7 The penetration power ofβ-particle is
A. zero
B. less thanα-particle
C. equal toα-particle
D. greater thanα-particle
8 Neon gas have three isotopes whose atomic numbers are
A. 20, 24 , 23
B. 20, 21 , 22
C. 20, 19 , 21
D. none of these
9 The nuclei of an element having the same charge number but different mass numbers are called:
A. Isobars
B. Isotopes
C. Isomers
D. Isobaric
10 γ-rays behave like a particle because they explain the
A. Compton effect
B. Photoelectric effect
C. Pair-production
D. all the above

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