Question

Which of the following methods is most suitable for obtaining a pure, dry sample of sodium chloride from a mixture of solid sodium chloride and sand?

• A. Shake the mixture with water, filter and dry the residue on the filter paper.
• B. Shake the mixture with water, filter and evaporate the filtrate.
• C. Heat the mixture gently and collect the substance which sublimes
• D. Heat the mixture gently and collect the substance which boils off

Answer 1

The correct option is B Shake the mixture with water, filter and evaporate the filtrate.

To obtain a dry sample of sodium chloride ($NaCl$) from sand, first, we have to dissolve it in water; then, $NaCl$ gets dissolved into water and by filtration, we can separate sand particles and after complete evaporation of water we left with a dry sample of $NaCl$.

Hence, option $B$ is correct.