Chemistry · Science General

States of Matter

2,682 Questions

States of matter questions explore physical changes, evaporation, phase transitions, and the properties of liquids and gases. Topics cover density, cryosurgery, heavy water, and electrolytes. This foundational chemistry topic frequently appears in general science sections of SSC and railway exams.

Phase change mechanismsEvaporation and temperature effectsProperties of liquidsPhysical versus chemical changesElectrolytes and heavy water

States of Matter Questions

Multiple choice

When a liquid converts into its vapour at its boiling point it is said to be

  1. vapourised

  2. condensed

  3. sublimised

  4. sedimentated
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The conversion of a liquid into its vapour at its boiling point is called as vaporization. So ,when a liquid converts into its vapour at its boiling point it is said to be ,vapourised. During the process of evaporation, cooling always occurs. This is because during evaporation the molecules of higher kinetic energy escape. The slow moving molecules are left behind.

Multiple choice

Souring of milk is an example of

  1. chemical change

  2. physical properties

  3. physical change

  4. chemical properties
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Chemical change is the change in which a substance becomes another substance with different properties. An energy change always accompanies a chemical change either loss or gain of heat, light, or some other form of energy. Example: souring of milk, silver tarnishing, electrolysis of water.

Multiple choice

Which of the following is not a characteristic of liquids?

  1. Volatility

  2. Diffussion

  3. Fixed shape

  4. Exerts vapour pressure
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Liquid will always take up the same amount of space and have the same number of molecules in it. Liquids, however, do not have a definite shape. Liquids take on the shape of the containers they are in. Paint and juice are just two examples of liquids.

Multiple choice

Conversion of gas into a liquid is called

  1. solidification

  2. melting

  3. condensation

  4. sublimation
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Condensation can be defined as the change in the state of matter from the gaseous phase to the liquid phase. e.g.conversion of water vapours into water.

Multiple choice

Which phase of matter does not take the shape of the container?

  1. Liquids

  2. Gas

  3. Solids

  4. Plastics
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In the solid phase the molecules are closely bound to one another by molecular forces. A solid holds its shape and the volume of a solid is fixed by the shape of the solid. It never takes the shape of the container.

Multiple choice

Sugar solution is an example of

  1. heterogenous mixture

  2. homogenous mixture

  3. elements

  4. compounds
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A mixture contains two or more substances present in it (in any ratio) which are called its components. In a homogeneous mixture, the components completely mix with each other and its composition is uniform throughout. Sugar solution, and air are thus, the examples of homogeneous mixtures.

Multiple choice

Match the physical properties of the substances given:

Column - 1 Column - 2
a. coke 1. porus black substance
b. petroleum 2. dark brown viscuous liquid
c. coal 3. hard black stone

  1. a - 1, b - 2, c - 3

  2. a - 2, b - 3, c - 1

  3. a - 3, b - 1, c - 2

  4. a - 3, b - 2, c - 1

  5. a - 2, b - 1, c - 3
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

 This is the correct option. Coke is a porus black substance. Petroleum is a dark brown viscuous crude oil. Coal is a hard black stone.