Question

to separate a mixture of hard candies and marbles, the most efficient method would be sorting the mixture by hand. complete to separate a mixture of iron filings and salt, the most efficient method would be passing a magnet through the mixture sorting the mixture by hand distilling the mixture

Explanation:

To separate iron filings and salt, we use the magnetic property of iron. A magnet attracts iron filings but not salt. Sorting by hand is inefficient for small particles, and distillation is for separating liquids or liquid - solid mixtures with different boiling points (not applicable here). So passing a magnet through the mixture is the most efficient.

Answer:

passing a magnet through the mixture