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

(C) Evaporation, diffusion, expansion of gases

Evaporation

• As more molecules gain the kinetic energy to become vapor, evaporation rises as temperature rises.
• The water molecules have a tendency to move fast when heated.

Diffusion

• Moving atoms or molecules from a region of higher concentration to one of lower concentration is what causes diffusion.
• The kinetic energy of matter increases with temperature, causing more matter to mix together.

Expansion of gases

• The frequency and magnitude of the material's molecular mobility increase with temperature, and this results in more energetic collisions.
• The gas expands as the energy of the impacts increases, pushing the molecules apart.

Explanation for incorrect options

• A specific reaction determines the solubility; if the reaction is endothermic, the solubility increases; otherwise, the solubility decreases.
• A gas decreases volume when it is compressed.
• If the quantity of gas molecules remains constant at this point, the pressure of the gas rises.
• If the pressure remains constant, decreasing the temperature of the gas also causes it to compress.
• Hence, all other options (A), (B), and (D) are incorrect.

Therefore, the correct option is (C) Evaporation, diffusion, expansion of gases .