Q. 23.7( 15 Votes )

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?
A. Sugar crystals in cold water.

B. Sugar crystals in hot water.

C. Powdered sugar in cold water.

D. Powdered sugar in hot water.

Answer :

An increase in the temperature increases the dissolution as it is easy to break the bonds of sugar at a higher temperature and dissolution is an endothermic process.


Powdered sugar dissolves faster in water, as the surface area of contact of the sugar molecules with water increases i.e. more molecules come in the contact with the molecules of water.


Thus, powdered sugar in hot water dissolves rapidly than other conditions.


Thus, Option (iv) is the correct.

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