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

Question # 2

Electrons are

Question # 3

The number of isotopes of hydrogen are

Question # 4

Neutron was discovered by

Question # 5

Neutron was discovered in

Question # 6

The chemical behaviour of an atom is determined by

Question # 7

A curie represents a very strong source of

Question # 8

Which of the following material has longer half life

Question # 9

The amount of energy equivalent to 1 a.m.u is

Question # 10

A mass spectrograph sort out

Question # 11

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

Question # 12

Radioactivity

Question # 13

The half life of radioactive substances depends upon

Question # 14

Radioactivity was discovered by

Question # 15

The diameter of an atom is of the order

Question # 16

The isotope/s of hydrogen is /are:

Question # 17

The number if neutrons in the nucleus of 92U235are

Question # 18

1 amu is equal to

Question # 19

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

Question # 20

In wilson cloud chamber, the air becomes saturated with:

Question # 21

Nucleus of a hydrogen atom may contain:

Question # 22

The rate of decay of a radioactive substance

Question # 23

U-238 present in the natural uranium is about:

Question # 24

How many isotopes of helium are present?

Question # 25

The energy is found from Einstein's mass energy relation is called

Question # 26

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

Question # 27

Neon gas have three isotopes whose atomic numbers are

Question # 28

The range of particle depends upon the factor

Question # 29

For Protium, the mass defect is:

Question # 30

Radiation detector are used to

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Nucleus of a hydrogen atom may contain:
A. One neutron only
B. Two protons and one neutron
C. Two protons and two neutrons
D. Aany of above
2 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
3 When a nucleus emits an alpha particles, its charge number decreases by
A. 3
B. 2
C. 6
D. 5
4 Rutherford performed an experiment on nuclear reactions in:
A. 1718 A.D
B. 1818 A.D
C. 1918 A.D
D. 2001 A.D.
5 Different radioactive material have
A. same half lives
B. different half lives
C. same mean lives
D. same total lives
6 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
7 β-particles are easily deflected by collisions than heavy
A. α-particles
B. β-particles
C. γ-particles
D. none of these
8 Mass of neutron is
A. 1.67 x 10-31kg
B. 1.67 x 10-27kg
C. 9.1 x 10-31kg
D. 1.67 x 10-19kg
9 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
10 Neutron was discovered in
A. 1915
B. 1920
C. 1925
D. 1932

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