Chemistry · Science General

States of Matter

2,382 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

Which of the following mixtures is/are heterogeneous?

  1. Mixture of alcohol and water

  2. Blood

  3. Sand

  4. All of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Mixture of alcohol + water and blood are homogeneous mixtures, i.e. the mixtures which have uniform composition and properties throughout. Sand is an example of a heterogeneous mixture. A heterogeneous mixture is made of different substances that remain physically separate. Heterogeneous mixtures always have more than one phase.

Multiple choice

Directions: Read the given scenario carefully and answer the question that follows. Preeti fills up her plastic bottle with hot water, but then she puts it in the sink beneath cold running water. Suddenly the bottle contracts and gets mangled.

Which of the following options best describe what happened to the bottle?

  1. The heat of the boiling water changed its shape.

  2. The boiling water contains hot gases that react with the plastic.

  3. The change in temperatures causes it to get mangled.

  4. The air outside exerts pressure on the bottle.

  5. The cold air outside pushes the hot water inside.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Correct. As water is poured over the bottle, some steam in the bottle condenses into water, reducing the amount of air inside. The pressure of air inside the bottle decreases than the pressure exerted by the air from outside the bottle. As a result the bottle contracts and gets mangled, bottle gets compressed.This activity again confirms that the air outside exerts pressure on the bottle.

Multiple choice

Water, milk, kerosene, etc. are liquids having various characteristics. Which of the following is not a characteristic of liquids?

  1. Liquids cannot be compressed much.

  2. Liquids have moderate to high densities.

  3. Liquids have a fixed volume and fixed shape.

  4. Liquids generally flow easily.

  5. Liquids do not fill their container completely.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This is the correct option as this is not a characteristic of liquids. Liquids do have a fixed volume, but they do not have a fixed shape.

Multiple choice

Which of the following statement is/are false?

a. The latent heat has to be always supplied to change the state of the matter. b. Higher the melting point of a solid substance, lesser will be the force of attraction between its particles. c. The heat required to convert a liquid into the vapour state is called latent heat of vapourisation.

  1. Only a

  2. Both a and b

  3. Only b

  4. Both b and c

  5. Only c
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This is the correct option as this statement is false. Higher the melting point of a solid substance, greater will be the force of attraction between its particles.

Multiple choice

Match the following:

 
Name of liquid Boiling point
a. Alcohol 1. 100 degree Celcius
b. Water 2. 357 degree Celcius
c. Mercury 3. 78 degree Celsius

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

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

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

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

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

This is the correct option. The boiling point of alcohol is 78 degree Celsius. The boiling point of water is 100 degree Celcius. The boiling point of mercury is 357 degree Celcius.

Multiple choice

Match the following:

 
a. Evaporation 1. This is the process in which a liquid changes into vapour form even below its boiling point.
b. Sublimation 2. This is the process of changing of a gas to a liquid form by cooling.
c. Condensation 3. This is the process in which a solid changes directly into vapours on heating and vice versa.

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

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

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

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

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

This is the correct option. Evaporation is the process in which a liquid changes into vapour form even below its boiling point. Sublimation is the process in which a solid changes directly into vapours on heating and vice versa. Condensation is the process of changing of a gas to a liquid form by cooling.