A student added milk, white of an egg, common salt and sand separately to water kept in four beakers. He stirred the mixtures well and filtered each of them. He stirred the mixtures well and filtered each of them. On filtering, he obtained solid residue on the filter paper in the case of:
a)milk b)white of an egg c)common salt d)sand
Option d. All the other forms a homogeneous solution as they get completely dissolved in water. Sand forms suspension and on filtering the solid residue you can see on the filter paper.