Question

1. what is the best way to separate a mixture of sand and iron filings? a. boiling b. using a magnet c. melting d. dissolving in water

Explanation:

Iron filings are magnetic while sand is not. Using a magnet can attract the iron filings and separate them from the sand without changing their chemical properties. Boiling, melting, and dissolving in water are not effective or appropriate for this separation as they do not take advantage of the magnetic - property difference and may cause chemical or physical changes to the substances.

Answer:

B. Using a magnet