Question

Label the given diagram showing lead storage battery:

P q r

• A. Pb $PbO_{2}$ 5 M $H_{2}SO_{4}$
• B. $PbO_{2}$ Pb conc. $H_{2}SO_{4}$
• C. $Pb_{3}O_{4}$ $PbO_{2}$ 50%$H_{2}SO_{4}$
• D. $PbO_{2}$ Pb dil. 38% $H_{2}SO_{4}$

Answer 1

Answer: (D)

$PbO_{2}$ Pb dil. 38% $H_{2}SO_{4}$

Answer 2

$PbO_{2}$ plates act as cathode while Pb plates act as anode. Dilute (38%)$H_{2}SO_{4}$ acts as an electrolyte.