Question

Which method is appropriate for separating a mixture of iron and aluminum? A. using a magnet B. distillation C. evaporation D. observing different densitie

Answer 1

Appropriate method for separating a mixture of iron and aluminum is definitely A. using a magnet. If we use the second method we will vaporize either aluminum or iron.
If we used the third method it would change liquid into a gas which is strange according to the task.
And observing (even for a long time) won't help separating.