Solubility is an important characteristic of substances. Some materials which are soluble in water may not be soluble in another liquid. When a substance dissolves completely in a liquid, then the combination is called a solution. The substance which dissolves is called the solute. The liquid which dissolves it, is called the solvent.If two liquids mix together completely, then they are called miscible otherwise they are immiscible.
Which of the following substances is insoluble in water?

Options

A. Sugar
B. Fine sand
C. Copper sulphate
D. Common salt

Answer

B

Explanation

Sugar, copper sulphate and common salt are soluble in water. Only fine sand is insoluble in water.