Iron rusts in moist air because of:

Given below are two statements:
Statement $I$: Corrosion is an electrochemical phenomenon in which pure metal acts as an anode and impure metal as a cathode.
Statement $II$: The rate of corrosion is more in alkaline medium than in acidic medium.
In the light of the above statements,choose the correct answer from the options given below:

Prevention of corrosion of iron by zinc coating is called

Write the reactions for the corrosion of iron $(Fe)$:
$(a)$ Oxidation of $Fe$.
$(b)$ Reduction of $O_2$.
$(c)$ Overall reaction of corrosion of $Fe$.

What is observed on the corrosion of $Fe$,$Cu$,and $Ag$ metals?

The factors affecting corrosion are