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

γ-rays behave like a particle because they explain the

Question # 2

The counter, which also provides the power to the G.M. tube is called:

Question # 3

Marie curie and Pierre curie discovered:

Question # 4

Neutron was discovered by

Question # 5

The chemical properties of all the isotopes of an elements are

Question # 6

Which of the following material has smaller has life

Question # 7

Nucleus consists of

Question # 8

Three quarks make:

Question # 9

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

Question # 10

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

Question # 11

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

Question # 12

There is present in paraffin a large amount of:

Question # 13

Mass of neutron is

Question # 14

After alpha decay the atomic number of the atom

Question # 15

Beta particles are

Question # 16

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

Question # 17

Charge on proton is

Question # 18

The diameter of an atom is of the order

Question # 19

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

Question # 20

The unit of decay constant is:

Question # 21

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

Question # 22

In radioactive decay, the new element which is formed due to the disintegration of original element is called

Question # 23

Neutron was disvovered by:

Question # 24

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

Question # 25

Structure of the nucleus was explained by

Question # 26

Rate of decay is actually described by.

Question # 27

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

Question # 28

For Protium, the mass defect is:

Question # 29

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

Question # 30

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 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
2 The half life of radioactive substances depends upon
A. amount of substance
B. energy of substance
C. state of substance
D. temperature of substance
3 The counter, which also provides the power to the G.M. tube is called:
A. Thin mica window
B. thin glass window
C. Airy window
D. Wooden window
4 Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:
A. 50
B. 100
C. 150
D. 200
5 The nucleus left after the emission of some radiation is called:
A. Parent nucleus
B. Daughter necleus
C. Mother necleus
D. Any of these
6 Referring to the above figure, we can say that of all the elements, the most stable element is
A. Phosphours
B. Iron
C. uranium
D. Lithium
7 Neutrons are
A. positive charge
B. negatively charged
C. massless
D. neutral
8 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
9 The reciprocal of decay constant λ of a radioactive material is:
A. Frequency
B. Half life
C. Year
D. Mean life
10 Which of these is not a radiation detector
A. Wilson cloud chamber
B. cyclotron acceleration
C. Geiger Miller counter
D. solid state detector

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