Question

In an `Ni-Cd` battery
A. all the reactant and products in the overall reaction are in the solid state
B. The voltage of the cell changes repidly
C. the electrolyte used is an `NaCl` solution
D. all the above are true.

Answer 1

Correct Answer - A
The nickel-cadmium cell (nicad cell) is a com-mon storage battery. It is a voltaic cell consisting of an anode of cadmimum and a cathode of hydrated nickel oxide (approximately `NiOOH`) on nicke, the electrolyte is potes-sium hydroxide.
To see why a nicad battery produces a constant voltage, we can write the Nernst equation for its reaction and look at `Q`. No gaseous substance is involved.