Question

How are mixtures different from compounds?

A. Mixtures combine to produce salts; compounds do not.
B. Mixtures can be separated by physical means; compounds cannot.
C. Mixtures combine several different elements; compounds only combine one element.
D. Mixtures involve particles that can be seen, like sand; compounds involve particles that cannot be seen, like air.

Answer 1

B. Mixtures can be separated by physical means; compounds cannot.

For example a mixture of sand and water can be separated by physical means such as filtration, but a compound such as water cannot be separated by such physical means.