The most convenient method to protect the bottom of the ship made of iron is
1. coating it with red lead oxide
2. white tin plating
3. connecting it with Mg block
4. connecting it with Pb block
The Zn acts as sacrificial or cathodic protection to prevent rusting of iron because:
1. of Zn < of Fe
2. of Zn > of Fe
3. of Zn = of fe
4. Zn is cheaper than iron
The cell reaction of micro electrochemical cell formed during rusting of iron is:-
1.
2.
3.
4.