Question

question 8 of 30 how can a mixture of salt and sand be separated? a. by allowing the salt to evaporate b. by using a magnet to attract the sand c. by dissolving the salt in water and filtering out the sand d. by adding oil and collecting the layers of salt and sand

Explanation:

• Option A: Salt doesn't evaporate easily; water evaporates when salt solution is heated. So A is wrong.
• Option B: Neither salt nor sand is magnetic, so a magnet can't attract sand. B is wrong.
• Option C: Salt dissolves in water, sand doesn't. Filtering the mixture after dissolving salt in water will retain sand on the filter paper and salt in the filtrate. Then evaporating the filtrate gives salt. This is a valid separation method.
• Option D: Both salt and sand are insoluble in oil, so adding oil won't separate them. D is wrong.

Answer:

C. By dissolving the salt in water and filtering out the sand