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Electrolysis and Storage Batteries

Electrolysis and Storage Batteries
Dry cell is modification of

Lead-acid cell
Deniell cell
Leclanche cell
Edison cell

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Electrolysis and Storage Batteries
The ratio of ampere-hour efficiency to watt-hour efficiency of a lead-acid cell is

just one
always greater than one
always less than one
none of the listed here

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Electrolysis and Storage Batteries
Internal short circuits are caused by

excess accumulation of sediment at the bottom of the cell
breakdown of one or more separators
none of the listed here
both of the options given here

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Electrolysis and Storage Batteries
The average charging voltage for alkali cell is about

1.2 V
2.1 V
1 V
1.7 V

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Electrolysis and Storage Batteries
In a battery cover is placed over the element and sealed to the top of the battery container. This is done

Both of the listed here
None of the listed here
to exclude dirt and foreign matter from the electrolyte
to reduce evaporation of water from electrolyte

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Electrolysis and Storage Batteries
The active materials of a nickel-iron battery are

nickel hydroxide
21% solution of kOH
all of these
powdered iron and its oxide

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