Question

The reaction which is taking place in nickel cadmium battery can be represented by which of the following equations?
A. `Cd+NiO_2 + 2H_2O to Cd(OH)_2 + Ni(OH)_2`
B. `Cd+ NiO_2 + 2OH^(-) to Ni + Cd(OH)_2`
C. `Ni+ Cd(OH)_2 to Cd to Ni(OH)_2`
D. `Ni(OH)_2 + Cd(OH)_2 to Ni + Cd + 2H_2O`

Answer 1

Correct Answer - A
Nickel-Cadmium battery
Anode-Cd, Cathode-`NiO_2`, Electrolyte-KOH
`{:("At anode:", Cd_((s))+2OH_((aq)) to Cd(OH)_(2(s)) + 2e^(-)),("At cathode:",NiO_(2(s))+2H_2O_((l))+2e^(-) to Ni(OH)_(2(s))+2OH_((aq))^(-)) ,(,overlineunderline(Cd_((s))+NiO_(2(s))+2H_2O_((l))to Cd(OH)_(2(s))+Ni(OH)_(2(s)))):}`