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

Nucleon means:

Question # 2

Neutrons are

Question # 3

Radioactivity was discovered by:

Question # 4

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

Question # 5

Three quarks make:

Question # 6

Beta particles are

Question # 7

The energy acquired by a mass of 1g moving with the speed of light is

Question # 8

γ-rays are

Question # 9

Radioactivity was discovered by

Question # 10

The total charge of any nucleus is given as

Question # 11

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

Question # 12

Radioactivity is

Question # 13

A mass spectrograph sort out

Question # 14

A curie represents a very strong source of

Question # 15

There is present in paraffin a large amount of:

Question # 16

Charge on proton is

Question # 17

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

Question # 18

The unit of decay constant is:

Question # 19

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

Question # 20

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

Question # 21

The chemical properties of an element depends upon the number of

Question # 22

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

Question # 23

The half life of uranium-238 is

Question # 24

A mass difference of 0.0012 u is equivalent to and energy of:

Question # 25

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

Question # 26

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

Question # 27

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

Question # 28

If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be

Question # 29

Mass of neutron is

Question # 30

If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 When a nucleus emits an alpha particle, it atomic mass decreased by
A. 2
B. 1
C. 4
D. 3
2 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
A. nuclear fission
B. nuclear fusion
C. man defect
D. radioactivity
3 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
4 Electrons are
A. positive charged
B. negatively charged
C. massless
D. neutral
5 The chemical properties of an element depends upon the number of
A. electron
B. position
C. photons
D. neutrons
6 The emission of radiations take place in elements, having charge number greater than
A. 109
B. 82
C. 69
D. 52
7 The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains
A. 3 more neutrons
B. 3 more electrons
C. 3 more protons
D. 3 more ions
8 In wilson cloud chamber, the air becomes saturated with:
A. Alcohol vapours
B. Water
C. Helium gas
D. Nitrogen gas
9 When a charged particle passes through matter, it produces ionization, this effect is used in
A. fission reaction
B. reactor
C. radiation detector
D. fusion reaction
10 Which of the following material has longer half life
A. radium
B. polonium
C. radium
D. uranium

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