On dissolving sugar in water at room tem...

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 ?

Sugar crystals in cold water.

Sugar crystals in hot water.

Powdered sugar in cold water.

Powdered sugar in hot water.

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The correct Answer is:

Since solution is cool to touch, dissolution of sugar in water is an endothermic reaction. Hence, high temperature will favour dissolution. Further, powdered sugar will dissolve faster due to its large surface area.

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