Question

Which one of the following sets of phenomena would increase on raising the temperature?

• A. Diffusion, evaporation, compression of gases
• B. Evaporation, compression of gases, solubility
• C. Evaporation, diffusion, expansion of gases
• D. Evaporation, solubility, diffusion, compression of gases

Answer 1

The correct option is C

Evaporation, diffusion, expansion of gases

Explanation for correct option:

Evaporation:

1. It is the process of conversion of liquid into vapours.
2. On increasing temperature, thermal energy of molecules increases and molecules start to rise up and thus rate of evaporation increases.

Diffusion:

1. It is the movement of a substance from an area of high concentration to an area of lower concentration.
2. On increasing temperature, speed of molecules increases and movement becomes faster.
3. On increasing temperature, intermolecular space between molecules increases and results in expansion of gases.

Expansion of gases:
1. As temperature increases, molecules of gases gains energy and start moving far apart.
2. With increase in temperature, gases start to expand.

Hence, option (c) Evaporation, diffusion, expansion of gases is the correct option