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

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Question # 1

Rutherford performed an experiment on nuclear reactions in:

Question # 2

How many isotopes of helium are present?

Question # 3

The rate of decay of radioactive substance

Question # 4

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

Question # 5

The figure 1.007276μ shows the mass of an:

Question # 6

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

Question # 7

γ-rays are

Question # 8

The half life of radioactive substances depends upon

Question # 9

For Protium, the mass defect is:

Question # 10

The range ofβ-particle in air is greater than that ofα-particle by

Question # 11

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

Question # 12

Radioactivity

Question # 13

The half lie of radium-226 is

Question # 14

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

Question # 15

A curie represents a very strong source of

Question # 16

Different radioactive material have

Question # 17

Radioactivity is

Question # 18

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

Question # 19

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

Question # 20

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

Question # 21

The nucleus/nuclei of hydrogen is/are:

Question # 22

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

Question # 23

A pair of quark and antiquark makes a:

Question # 24

When radioactive nucleus emits aβ-particle, the proton-neutron ratio

Question # 25

Charge on neutron is

Question # 26

After alpha decay the atomic number of the atom

Question # 27

The range of particle depends upon the factor

Question # 28

Pair production take place when energy ofγ-rays photon is

Question # 29

There is present in paraffin a large amount of:

Question # 30

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Neutron was disvovered by:
A. Rutherford in 1920
B. Chadwick in 1922
C. Bohr in 1913
D. Compton in 1927
2 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
3 For Protium, the mass defect is:
A. Infinite
B. Zero
C. Very large
D. A few grams
4 β-particles are easily deflected by collisions than heavy
A. α-particles
B. β-particles
C. γ-particles
D. none of these
5 The number of protons inside a nucleus is called
A. mass number
B. atomic weight
C. atomic number
D. none of these
6 The emission of radiations take place in elements, having charge number greater than
A. 109
B. 82
C. 69
D. 52
7 A mass difference of 0.0012 u is equivalent to and energy of:
A. 0.5 Me V
B. 1.13 MeV
C. 5.13 MeV
D. 1.13 keV
8 Which are not the elementary particles?
A. Photons
B. Leptons
C. Hadrons
D. Quarks
9 Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:
A. 50
B. 100
C. 150
D. 200
10 In 1932 Chadwick discovered
A. proton
B. neutron
C. photon
D. electron

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