MHT CET2017ChemistryElectrochemistry
Which among the following equations represents the reduction taking place in lead accumulator at positive electrode, While it is being used as a source of electrical energy?
Options
- AP b → P b 2 +
- BP b 4 + → P b
- CP b 2 + → P b
- DP b 4 + → P b 2 +
Correct answer
D. P b 4 + → P b 2 +
Step-by-step solution
Reaction at positive electrode is, P b O 2 ( s ) + 4 H + + S O 4 2 − ( a q ) + 2 e − → P b S O 4 ( s ) + 2 H 2 O ( l ) ∴ P b 4 + is converted into P b 2 +