Question

why does a mercury cell give constant voltage through out its life

Answer 1

hg cells use KOH or NaOH as their electrolyte and cells using NaOH have constant voltage at low discharge current.KOH in turn provides constant voltage at higher current

Answer 2

Mercury cell give constant voltage through out its life

Explanation:

• The object which can convert the chemical energy present in it to electrical energy is called as cell or battery.
• The conversion of chemical energy to electrical energy requires the occurrence of a chemical reaction which demands dissociation of composition substances into ions.
• The mercury cell is exceptional in working mechanisms when compared with other type of cells.
• It is because the overall reaction of the mercury cell yields zinc hydroxide and mercury as the products.
• As it doesn't yield any ions and is not dependent on them mercury cells give constant voltage through out its life.

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