Question

On dissolving sugar in water at room temperature solution feels cool to touch.
Under which of the following cases dissolution of sugar will be most rapid?(i) Sugar crystals in cold water.(ii) Sugar crystals in hot water.(iii) Powdered sugar in cold water.(iv) Powdered sugar in hot water.EXPLAIN IN DETAIL FOR YOUR ANSWER.

Answer 1

Powdered sugar in hot water
there are 2 quantities here
1 sugar
so
powdered sugar as more sugar can get in space between particles of water
2 water
so
for water if it is hot more KE therefore more intermolecular space this increase solubility