M Prep | MCAT 2015 Question of the Day - Prep, Practice Questions, and More!

Q:

An iron nail was immersed in a solution of copper sulfate and when it was removed from the solution, it was coated with a layer of copper metal. After a different iron nail was immersed in a solution of zinc nitrate and removed, this nail rusted just as rapidly as a new iron nail. Rank these three metals in order of activity from most active to least active.

A

Zn > Cu > Fe

B

Fe > Cu > Zn

C

Zn > Fe > Cu

D

Cu > Fe > Zn