Why does potassium permanganate dissolve faster in water than sugar??

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Solution

This can be simply explained on the basis of Like Dissolves Like .
Water being a polar solvent has net dipole moment and KMnO₄ is an ionic compound. There is strong ion-dipole interaction take place between water and KMnO₄.

But Sugar having a large number of hydroxyl groups which form a H-bonding with KMnO₄.The H-bonding is weaker than the strong ion-dipole interaction.Therefore, water dissolves faster than sugar in KMnO₄

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