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

According to Rutherford atomic model, the positive charge in an atom

Question # 2

After alpha decay the atomic number of the atom

Question # 3

γ-rays are

Question # 4

Which are not the elementary particles?

Question # 5

Neutron was discovered by

Question # 6

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

Question # 7

Fraction of the decaying atoms per unit time is called

Question # 8

Which of these is not a radiation detector

Question # 9

A mass spectrograph sort out

Question # 10

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

Question # 11

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

Question # 12

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

Question # 13

In wilson cloud chamber, the air becomes saturated with:

Question # 14

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

Question # 15

Nucleus consists of

Question # 16

Different radioactive material have

Question # 17

Radioactivity was discovered by

Question # 18

Gamma rays consist of steam of

Question # 19

Radioactivity is

Question # 20

U-238 present in the natural uranium is about:

Question # 21

Radioactivity

Question # 22

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

Question # 23

Marie curie and Pierre curie discovered:

Question # 24

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

Question # 25

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

Question # 26

The number if neutrons in the nucleus of 92U235are

Question # 27

Rutherford performed an experiment on nuclear reactions in:

Question # 28

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

Question # 29

The emission of radiations take place in elements, having charge number greater than

Question # 30

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Heavy water is made of one oxygen atom and two atoms of:
A. Protium
B. Deuterium
C. Tritium
D. Any of these
2 The amount of energy equivalent to 1 a.m.u is
A. 9.315 Mev
B. 93.15 Mev
C. 931.5 Mev
D. 2.22 Mev
3 Mass of proton is of order of
A. 10-31gm
B. 10-27kg
C. 10-24gm
D. 10+27kg
4 Beta particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
5 Which of the following material has longer half life
A. radium
B. polonium
C. radium
D. uranium
6 Charge on proton is
A. 1.59 x 10-9C
B. 1.59 x 10-7C
C. -1.59 x 10-19 C
D. 1.59 x 10-19C
7 γ-rays are
A. electrostatic waves
B. electromagnetic waves
C. heavy particles
D. longitudinal waves
8 After alpha decay the atomic number of the atom
A. increase by four
B. decreases by two
C. increases by two
D. decrease by four
9 Neutron was discovered by
A. Curie
B. Roentgen
C. Chadwick
D. Rutherford
10 The number of all the protons and neutrons in a nucleus is known as
A. atomic number
B. mass number
C. charge number
D. none of these

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