ECAT Pre General Science Physics Chapter 21 MCQ Test With Answer

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

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Question # 1

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 # 2

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

Question # 3

When certain nucleus emits anα particle, its mass number:

Question # 4

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

Question # 5

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

Question # 6

Proton was discovered by Rutherford in

Question # 7

Mass of proton is

Question # 8

The missing mass which is converted to energy in the formation of nucleus, is called

Question # 9

γ-rays behave like a particle because they explain the

Question # 10

Nucleus of a hydrogen atom may contain:

Question # 11

The chemical behaviour of an atom is determined by

Question # 12

Different radioactive material have

Question # 13

U-238 present in the natural uranium is about:

Question # 14

Three quarks make:

Question # 15

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

Question # 16

Neutron was disvovered by:

Question # 17

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

Question # 18

Beta particles are

Question # 19

The chemical properties of all the isotopes of an elements are

Question # 20

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

Question # 21

A pair of quark and antiquark makes a:

Question # 22

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

Question # 23

After alpha decay the atomic number of the atom

Question # 24

Radioactivity is

Question # 25

Referring to the above figure, we can say that of all the elements, the most stable element is

Question # 26

Structure of the nucleus was explained by

Question # 27

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

Question # 28

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

Question # 29

Electrons are

Question # 30

1 amu is equal to

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The chemical properties of an element depends upon the number of
A. electron
B. position
C. photons
D. neutrons
2 When certain nucleus emits aβ-particles, is mass number:
A. Remain same
B. Increases by one
C. Decreases by one
D. Decreases by four
3 Which of the following material has smaller has life
A. uranium
B. polonium
C. radium
D. radian
4 Mass of proton is of order of
A. 10-31gm
B. 10-27kg
C. 10-24gm
D. 10+27kg
5 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
6 According to Rutherford atomic model, the positive charge in an atom
A. is concentrated at its centre
B. is in the form of positive electron at same distance from its centre
C. is spread uniformly through its volume
D. none of these
7 The isotope/s of hydrogen is /are:
A. Protium
B. Deuterium
C. Tritium
D. Both (A) and (B)
8 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
9 Radium was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. Rutherford
10 The half life of radioactive substances depends upon
A. amount of substance
B. energy of substance
C. state of substance
D. temperature of substance

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