Question

The life span of a Daniel cell may increased by:

• A. large Cu electrode
• B. lowering of CuSO${}_4$ concentration
• C. lowering of ZnSO${}_4$ concentration
• D. large zinc electrode

Answer 1

The correct option is D large zinc electrode

In a daniel cell at anode Zn gets converted to $Z{n}^{2+}$
$\therefore$ If the size of electrode is increases more zinc can be oxidized,
hence the life span of the cell may be increased

Hence, option d is correct.