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

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

Question # 2

Structure of the nucleus was explained by

Question # 3

For an atom having atomic number Z and atomic weight A, the number of electron in an atoms

Question # 4

The most abundant isotope of neon is

Question # 5

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

Question # 6

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

Question # 7

When certain nucleus emits anα particle, its mass number:

Question # 8

Phenomenon of radioactivity is due to disintegration of

Question # 9

Rate of decay is actually described by.

Question # 10

Curie is a unit of

Question # 11

The chemical properties of an element depends upon the number of

Question # 12

The rate of decay of radioactive substance

Question # 13

The chemical properties of all the isotopes of an elements are

Question # 14

The time required for a radioactive material to decrease in active by one half is called

Question # 15

How many isotopes of helium are present?

Question # 16

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

Question # 17

Radioactivity was discovered by

Question # 18

1 amu is equal to.

Question # 19

Neutron was disvovered by:

Question # 20

A pair of quark and antiquark makes a:

Question # 21

Three quarks make:

Question # 22

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

Question # 23

Neutron was suggested to be in the nucleus by:

Question # 24

Electrons are

Question # 25

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

Question # 26

Proton was discovered by Rutherford in

Question # 27

How much time, theα-particle more massive than an electron

Question # 28

Charge on neutron is

Question # 29

Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:

Question # 30

Neutron was discovered by

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Phenomenon of radioactivity is due to disintegration of
A. nucleus
B. neutron
C. proton
D. molecule
2 For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is
A. A - Z
B. A
C. Z
D. A + Z
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 Neutrons are
A. positive charge
B. negatively charged
C. massless
D. neutral
5 When certain nucleus emits aβ-particles, is mass number:
A. Remain same
B. Increases by one
C. Decreases by one
D. Decreases by four
6 The nucleus/nuclei of hydrogen is/are:
A. Proton
B. Deuteron
C. Triton
D. All of these
7 There is present in paraffin a large amount of:
A. Nitrogen
B. Hydrogen
C. Carbon
D. Baryllium
8 When a nucleus emits an alpha particles, its charge number decreases by
A. 3
B. 2
C. 6
D. 5
9 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
10 1 amu is equal to
A. 1.66 x 10-24kg
B. 1.66 x 10-19kg
C. 1.66 x 10-34kg
D. 1.66 x 10-27kg

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