Question

10 mL of freshly prepared iron sulphate was taken in each of four testtubes. Strips of copper, iron, zinc and aluminium were introduced,each metal in a different test tube. A black residue was obtained in two test tube. The right pair ofmetals forming the precipitates is
a. copper and zinc b.aluminium and copper
c. iron and aluminium d.zinc and aluminium​

Answer 1

Answer:

zinc and aluminum as only they can displace iron