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

Mist is an example of

  1. foam

  2. aerosol

  3. emulsion

  4. gel

  5. sol
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Mist is an example of aerosol.

Multiple choice

Cod liver oil is an example of

  1. suspension

  2. true solution

  3. emulsion

  4. aerosol

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

Cod liver oil is an example of emulsion. Emulsion is a colloidal system in which both the dispersed phase and the dispersion medium are immiscible liquids.

Multiple choice

Which one of the following is lightest?

  1. Water

  2. Gas

  3. Oil

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

Gases have much lower densities compared to liquids like water, oil, or alcohol because their molecules are far apart. Therefore, for a given volume, a gas will weigh significantly less than the liquid options.

Multiple choice

Fog is the colloidal system of

  1. solid in gas

  2. gas in gas

  3. liquid in gas

  4. gas in liquid
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Fog is a colloid where liquid water droplets are dispersed in a gas (air).

Multiple choice

At high temperatures, enzymes are

  1. denatured

  2. unaffected

  3. inactivated

  4. none of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Enzymes are proteins, and high temperatures cause them to lose their specific three-dimensional shape, a process known as denaturation, which renders them non-functional.

Multiple choice

Which of the following options is a physical change?

  1. Burning of cooking gas

  2. Souring of milk

  3. Digestion of food

  4. Dissolution of sugar into water
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Dissolving sugar in water is a physical change because if you were to dissolve the sugar in water and then let the water evaporate, the sugar would still be left. All of the components that you started with are still there, even if you can't see them. A physical change is a change of matter that does not alter the chemical properties of that matter. A chemical change is when bonds are broken and new bonds are being formed between different atoms. Chemical Change: Baking soda and vinegar fizzing and creating bubbles Physical Change: When water freezes, it doesn't create a new substance. Ice is still H2O just in a solid form.

Multiple choice

Which of the following options is a chemical change?

  1. Evaporation of water

  2. Burning of candle

  3. Both (1) and (2)

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Burning of a candle involves a chemical change because the wax reacts with oxygen to produce new substances like carbon dioxide and water vapor. Evaporation is a physical change.

Multiple choice

Which is the fourth state of matter?

  1. Solid

  2. Liquid

  3. Gas

  4. Plasma

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Plasma is widely considered the fourth state of matter, distinct from solids, liquids, and gases.

Multiple choice

Which of the following statements is correct?

  1. Rolling of a ball of dough to make roti is a reversible change.

  2. Dissolving of salt in water is a chemical change.

  3. Explosion of crackers is a physical change.

  4. The melting of ice lolly is an irreversible change.

  5. Evaporation of water is an irreversible change.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This statement is correct. This would become irreversible if it were cooked but now it iws reversible as it is just a physical change.