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Question
Answer the following in brief.
Write the electrode reactions and net cell reaction in NICAD battery.
Solution
The electrode reactions taking place are:
`"Cd"_(("s")) + 2"OH"_(("aq"))^(-) -> "Cd"("OH")_(2("s")) + 2"e"^(-)` (oxidation at anode)
`"NiO"_(2("s")) + 2"H"_2"O"_("l") + 2"e"^(-) -> "Ni"("OH")_(2("s")) + 2"OH"_(("aq"))^(-)` (reduction at cathode)
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`"Cd"_(("s")) + "NiO"_(2("s")) + 2"H"_2"O"_("l") -> "Cd"("OH")_(2("s")) + "Ni"("OH")_(2("s"))` (overall cell reaction)
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