1.

What is nickel-cadmium cell ? State its one merit and one demerit over storage cell. Write the overall reaction that occurs during discharging of this cell.

Answer»

Solution :Nickel-cadmium cell is a SECONDARY cell and it is rechargeable.
Merit : It has a longer life than the storage cell.
Demerit : It is more EXPENSIVE to MANUFACTURE.
The overall reaction when the discharging takes place is as under :
`Cd(s) + 2Ni(OH)_(3) to CDO (s) + 2Ni(OH)_(2) (s) + H_(2)O (L)`


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