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

White phosphorus is kept under

  1. alcohol

  2. petrol

  3. water

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

White phosphorus is an extremely reactive non-metal that spontaneously ignites in air at room temperature. To prevent combustion, it is stored submerged under water.

Multiple choice

"Antifreeze" is used in car radiators to stop the liquid that cools the engine from, well, freezing when it gets cold outside. Water is one component of antifreeze; what is the other main component?

  1. Benzene

  2. Sodium chloride

  3. Acetone

  4. Ethylene glycol
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Ethylene glycol is the primary component in automotive antifreeze because it effectively lowers the freezing point of water. Sodium chloride is corrosive, and the others are not used for this specific purpose.

Multiple choice

Convection cannot take place in _______________.

  1. water

  2. mercury

  3. carbon dioxide

  4. air

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

This is the correct option. Convection cannot take place in mercury. Mercury gets heated by conduction and not by convection, as it is a very good conductor of heat.

Multiple choice

If the colloidal particles are made of aggregates of atom, it is called

  1. multimolecular colloids

  2. Lyphobic colloids

  3. Lyophilic colloids

  4. Associated colloids

  5. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This option is correct. When the colloidal particles are made of aggregates of atom or molecules with molecular size less than 10-7 cm, they are known as multimolecular colloids.

Multiple choice

Reena when touching an ice cream at 0ºC, felt it colder than water at 0ºC. Which of the following options explains this correctly?

  1. It is because of latent heat of condensation.

  2. It is because of latent heat of fusion to melt.

  3. It is because of latent heat of convection.

  4. It is because of latent heat of vaporisation.

  5. It is because of latent heat of steam.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Latent heat of water is very high. That is, ice cream melts faster than ice. Technically, ice cream absorbs heat faster than ice. if you place your hand in ice cream it absorbs heat from your hand faster. This makes us feel ice cream is colder than ice.

Multiple choice

Water pipes in hilly areas often burst on a cold frosty night, because

  1. the material in which pipes are made contracts due to cold and so it burst

  2. water in the pipes freezes and on freezing water expands, so pipes burst

  3. burst makes the pipes rusty, so they break

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

Water has a unique property where it expands when it freezes into ice, unlike most substances that contract. This expansion exerts immense pressure inside closed pipes on cold frosty nights, causing them to burst.

Multiple choice

Which of the following changes is/are physical?

  1. Melting of ice

  2. Melting of wax

  3. Beating of aluminium to make aluminium foil

  4. Formation of steam from water

  5. All of the above
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

This is the correct option. All above examples are physical changes.