Which metal cation has the greatest tendency to be reduced (a) pb2+ (b) cr3+ (c) fe2+ (d) sn2+

 (a)

Explanation:

The metal with negative reduction potential will easily lose electrons and thus is oxidized and the one with positive reduction potential will easily gain electrons and thus is reduced.

Where both are standard reduction potentials.

Thus here with negative reduction potential and least magnitude has the most tendency to gain electrons and thus can be most easily reduced.

the correct answer would be b. amelia, because the particals of gas move really fast (charged particals) and gas also has a lot of room (particals move independently) so the only answer that has both of those is amelia's.