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

Binding energy per nucleus is

Question # 2

For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is

Question # 3

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

Question # 4

Three quarks make:

Question # 5

Rutherford performed an experiment on nuclear reactions in:

Question # 6

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

Question # 7

How many isotopes of helium are present?

Question # 8

The total charge of any nucleus is given as

Question # 9

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

Question # 10

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

Question # 11

A pair of quark and antiquark makes a:

Question # 12

The number of isotopes of hydrogen are

Question # 13

Neutron was discovered by

Question # 14

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 # 15

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

Question # 16

Radioactivity is

Question # 17

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

Question # 18

Marie curie and Pierre curie discovered:

Question # 19

There is present in paraffin a large amount of:

Question # 20

The nucleus/nuclei of hydrogen is/are:

Question # 21

Nucleus of a hydrogen atom may contain:

Question # 22

The reciprocal of decay constant λ of a radioactive material is:

Question # 23

The most abundant isotope of neon is

Question # 24

The diameter of an atom is of the order

Question # 25

Pair production take place when energy ofγ-rays photon is

Question # 26

The rate of decay of radioactive substance

Question # 27

The chemical behaviour of an atom is determined by

Question # 28

The half life of uranium-238 is

Question # 29

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

Question # 30

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The nuclei of an element having the same charge number but different mass numbers are called:
A. Isobars
B. Isotopes
C. Isomers
D. Isobaric
2 Neutron was disvovered by:
A. Rutherford in 1920
B. Chadwick in 1922
C. Bohr in 1913
D. Compton in 1927
3 In radioactive decay, the new element which is formed due to the disintegration of original element is called
A. element
B. daughter element
C. parent element
D. none of these
4 Binding energy per nucleus is
A. greater for heavy nucleus
B. least for heavy nucleus
C. greatest for light nuclei
D. decreases for medium weight niclei
5 A curie represents a very strong source of
A. α-particle
B. β-particle
C. γ-particle
D. none of these
6 How much time, theα-particle more massive than an electron
A. 600
B. 7000
C. 5000
D. 15000
7 The energy is found from Einstein's mass energy relation is called
A. binding energy of electron
B. binding energy of proton
C. binding energy of neutron
D. binding energy of nucleus
8 Examples of moderators used in a fission reactor is/are:
A. Water
B. Heavy water
C. Carbon
D. Hydrocarbon
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 For an atom having atomic number Z and atomic weight A, the charge on the nucleus is
A. A - Z
B. A + Z
C. Z
D. A

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