Question

Lead accumulator is
A. acid storage cell
B. alkali storage cell
C. both
D. can't be predicted

Answer 1

Hint:In the lead accumulator the electrical energy is not generated inside the cell but is previously stored in it from the external source.

Complete step by step answer:
Lead accumulator consumes sulphuric acid. Hence, it is considered to be an acid storage cell.
A lead accumulator is considered to be a secondary cell as electrical energy is not generated inside the cell itself but it is previously stored in it from the external source. Lead storage cell is reversible because cell reactions are reversed if external electromotive force is greater than emf of the cell applied to it. So, in this cell, the net cell reaction can be reversed by applying external opposing electromotive force greater than the cell of emf. Electrical energy can be easily stored from its external source and can supply during discharge. Lead storage cell is considered as an accumulator that's why it is called a lead accumulator as because the energy is stored in the form of chemical energy. The voltage of the above cell is independent of electrode or cell bit strongly dependable on the strength of the acid (sulphuric acid).

Note:
Lead accumulators consist of lead plates in the form of negative electrodes. Alternatively, positive and negative electrodes are arranged; this collection of lead plates is dipped in ebonite or glass (a non-conducting vessel) and 38% ${H_2}S{O_4}$ .Negative plates and positive plates are interconnected to each other.
Lead accumulator can be represented as $Pb\left( s \right)|PbS{O_4}\left( s \right)|38\% {H_2}S{O_4}\left( {aq} \right)|PbS{O_4}\left( s \right)|Pb{O_2}\left( s \right)|P{b^ + }$
-> Lead accumulators are used in automobiles and are popularly known as car batteries. These are widely used as DC voltage in laboratories.