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

Neutron was discovered in

Question # 2

Binding energy per nucleus is

Question # 3

The half lie of radium-226 is

Question # 4

1 amu is equal to

Question # 5

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

Question # 6

A pair of quark and antiquark makes a:

Question # 7

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

Question # 8

Neutrons are

Question # 9

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

Question # 10

The half life of uranium-238 is

Question # 11

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

Question # 12

The rate of decay of radioactive substance

Question # 13

The number if neutrons in the nucleus of 92U235are

Question # 14

Radioactivity is

Question # 15

Mass of neutron is

Question # 16

The nuclei of an element having the same charge number but different mass numbers are called:

Question # 17

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

Question # 18

Which of the following material has longer half life

Question # 19

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

Question # 20

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

Question # 21

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

Question # 22

Charge on neutron is

Question # 23

For Protium, the mass defect is:

Question # 24

The isotope/s of hydrogen is /are:

Question # 25

Three quarks make:

Question # 26

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

Question # 27

When thorium nucleus emits aβ-particle, the daughter nucleus is called:

Question # 28

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

Question # 29

β-particles are easily deflected by collisions than heavy

Question # 30

The chemical behaviour of an atom is determined by

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Radioactivity was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. All of them
2 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
3 The nuclei of an element having the same charge number but different mass numbers are called:
A. Isobars
B. Isotopes
C. Isomers
D. Isobaric
4 Marie curie and Pierre curie discovered:
A. Uranium
B. Polonium
C. Radium
D. Both (A) and (C)
5 Fraction of the decaying atoms per unit time is called
A. decay atom
B. decay element
C. decay constant
D. decay
6 In wilson cloud chamber, the air becomes saturated with:
A. Alcohol vapours
B. Water
C. Helium gas
D. Nitrogen gas
7 In his experiment on nuclear reactions, Rutherford bombardedα particles on:
A. Nitrogen
B. Hydrogen
C. Lead
D. Oxygen
8 The distance travelled byα-particle in a medium before coming to rest, is called
A. range ofγ-particle
B. range of neutrons
C. range of particle
D. none of these
9 The energy acquired by a mass of 1g moving with the speed of light is
A. 3 x 108J
B. 9 x 1013J
C. 3 x 1013J
D. 9 x 1016J
10 Heavy water is made of one oxygen atom and two atoms of:
A. Protium
B. Deuterium
C. Tritium
D. Any of these

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