Question

Between sugar, potassium permanganate and sand, which dissolve in distilled water and which ones do not?

Answer 1

potassium permanganate

it is readily soluble in water and forms a homogenous solution of potassium permanganate in water.

sand

it is not soluble in water. When sand is mixed into water, the grains of sand will remain suspended in the water as long as they are being actively stirred and distributed through the liquid. When the water is left still, however, the particles of sand will settle to the bottom of the container holding the water, leaving plain water above the layer of sand. This type of mixture is called a suspension, because the sand was suspended in the water.

sugar

Distilled water contains no dissolved ions.Hence it will  not conduct electricity.so sugar will readily dissolve in water but doesn't form cations and anions in solution.