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 number of protons inside a nucleus is called

Question # 2

Rutherford performed an experiment on nuclear reactions in:

Question # 3

The number if neutrons in the nucleus of 92U235are

Question # 4

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

Question # 5

Which are not the elementary particles?

Question # 6

For an atom having atomic number Z and atomic weight A, the charge on the nucleus is

Question # 7

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

Question # 8

Beta particles are

Question # 9

The figure 1.007276μ shows the mass of an:

Question # 10

Mass of neutron is

Question # 11

Which of these is not a radiation detector

Question # 12

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

Question # 13

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

Question # 14

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

Question # 15

Radioactivity was discovered by:

Question # 16

U-238 present in the natural uranium is about:

Question # 17

The half lie of radium-226 is

Question # 18

For Protium, the mass defect is:

Question # 19

Proton was discovered by Rutherford in

Question # 20

Which of the following material has smaller has life

Question # 21

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

Question # 22

Alfa particles are

Question # 23

After alpha decay the atomic number of the atom

Question # 24

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

Question # 25

In radioactive decay, the new element which is formed due to the disintegration of original element is called

Question # 26

The rate of decay of radioactive substance

Question # 27

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

Question # 28

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

Question # 29

An alpha particle has a charge of

Question # 30

A pair of quark and antiquark makes a:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The range ofβ-particle in air is greater than that ofα-particle by
A. 1000 times
B. 100 times
C. 15 times
D. 10 times
2 Mass of proton is
A. 1.67 x 10-27kg
B. 1.67 x 10-31kg
C. 1.66 x 10-34kg
D. 1.67 x 10-17kg
3 Maric Curie and Pieree Curie discovered two new radioactive elements, which are called
A. polonium uranium
B. uranium and radium
C. polonium and radium
D. none of these
4 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
5 Alfa particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
6 The diameter of an atom is of the order
A. 10-125m
B. 10-11m
C. 10-10m
D. 10-9m
7 The range of particle depends upon the factor
A. charge, mass and energy of particle
B. density of medium
C. ionization potential of the atoms
D. all the above
8 In his experiment on nuclear reactions, Rutherford bombardedα particles on:
A. Nitrogen
B. Hydrogen
C. Lead
D. Oxygen
9 Nuclei that have the same charge number but different mass number are called
A. isotones
B. isomers
C. isotopes
D. isobars
10 The penetration power ofβ-particle is
A. zero
B. less thanα-particle
C. equal toα-particle
D. greater thanα-particle

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