chapter 5 electrochemistry class 12 chemistry textbook solution
3. Answer the following in brief
xi. Write the electrode reactions and net cell reaction in NICAD battery.
Answer:-
The electrode reactions taking place are:
1. Oxidation at the anode:
\[
\text{Cd}_{(s)} + 2\text{OH}_{(\text{aq})}^- \rightarrow \text{Cd}(\text{OH})_{2(\text{s})} + 2e^-
\]
2. Reduction at the cathode:
\[
\text{NiO}_{2(\text{s})} + 2\text{H}_2\text{O}_{(\text{l})} + 2e^- \rightarrow \text{Ni}(\text{OH})_{2(\text{s})} + 2\text{OH}_{(\text{aq})}^-
\]
Overall cell reaction:
\[
\text{Cd}_{(\text{s})} + \text{NiO}_{2(\text{s})} + 2\text{H}_2\text{O}_{(\text{l})} \rightarrow \text{Cd}(\text{OH})_{2(\text{s})} + \text{Ni}(\text{OH})_{2(\text{s})}
\]
chapter 5 elctrochemistry textbook solution page 118