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

Mass of neutron is

Question # 2

Rate of decay is actually described by.

Question # 3

The unit of decay constant is

Question # 4

γ-rays behave like a particle because they explain the

Question # 5

Neutron was discovered in

Question # 6

When a nucleus emits an alpha particle, it atomic mass decreased by

Question # 7

A curie represents a very strong source of

Question # 8

An alpha particle has a charge of

Question # 9

β-particles are easily deflected by collisions than heavy

Question # 10

Radiation detector are used to

Question # 11

Rutherford performed an experiment on nuclear reactions in:

Question # 12

The number if neutrons in the nucleus of 92U235are

Question # 13

γ-rays are

Question # 14

The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains

Question # 15

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

Question # 16

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

Question # 17

Charge on proton is

Question # 18

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

Question # 19

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

Question # 20

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

Question # 21

After alpha decay the atomic number of the atom

Question # 22

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

Question # 23

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

Question # 24

Different radioactive material have

Question # 25

Mass of proton is

Question # 26

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

Question # 27

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

Question # 28

The number of isotopes of hydrogen are

Question # 29

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

Question # 30

The total charge of any nucleus is given as

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The number if neutrons in the nucleus of 92U235are
A. Infinite
B. 92
C. 235
D. 143
2 The chemical properties of an element depends upon the number of
A. electron
B. position
C. photons
D. neutrons
3 Curie is a unit of
A. reluctance
B. resistivity
C. binding energy
D. radioactivity
4 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
5 When a nucleus emits an alpha particle, it atomic mass decreased by
A. 2
B. 1
C. 4
D. 3
6 The emission of radiations take place in elements, having charge number greater than
A. 109
B. 82
C. 69
D. 52
7 Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called
A. deuteron
B. deterium
C. protium
D. tritium
8 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
9 If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be
A. Equal to 1
B. Less than 1
C. Greater than 1
D. Infinity
10 Phenomenon of radioactivity is due to disintegration of
A. nucleus
B. neutron
C. proton
D. molecule

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