During galvanization of iron,which metal is used for coating the iron surface?

Galvanisation is the:

Rusting of iron is catalyzed by which of the following?

Blocks of $Mg$ are often attached to the bottom of ships. Why?

The standard electrode potentials are given as:
$E^o_{Fe^{+2}/Fe} = -0.44 \, V$ and $E^o_{H^{+}/O_2/H_2O} = 1.23 \, V$
Calculate the $E^o_{cell}$ for the corrosion process: ............. $V$

Which of the following metals corrodes readily in moist air?