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Electrolysis and Storage Batteries

Electrolysis and Storage Batteries
Hydrogen evolved during charging produces explosive mixture when it is more than

10 %
5 %
6 %
8 %

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Electrolysis and Storage Batteries
Local action in a battery is indicated by

excessive gassing under load conditions
none of the listed here
both of the listed here
excessive drop in the specific gravity of electrolyte even when the cell is on open circuit

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Electrolysis and Storage Batteries
A battery of 6 cells will show a drop of _____ volts from fully charged state to fully discharged state.

2.0
2.4
2.5
2.8

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Electrolysis and Storage Batteries
The active materials on the positive and negative plates of a fully charged lead-acid battery are

lead and lead peroxide
lead sulphate and lead
None of these
lead peroxide and lead

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Electrolysis and Storage Batteries
The active material of the positive plates of silver-zinc batteries is

zinc powder
lead
lead oxide
silver oxide

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Electrolysis and Storage Batteries
The effect of sulphation is that the internal resistance

increases
none of the listed here
decreases
remains same

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