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Electrolysis and Storage Batteries

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

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

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Electrolysis and Storage Batteries
During the idle period of the battery, strong electrolyte tends to change the active material of the cell into

PbO
Pb02
Pb
PbSC-4

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Electrolysis and Storage Batteries
Over charging

produces excessive gassing
all of the listed here
loosens the active material
increases the temperature resulting in buckling of plates

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Electrolysis and Storage Batteries
During the charging of a lead-acid cell

its voltage increases
it gives out energy
specific gravity of H₂SO₄ decreases
its cathode becomes dark chocolate brown in colour

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Electrolysis and Storage Batteries
The output voltage of a charger is

less than the battery voltage
none of the listed here
higher than the battery voltage
the same as the battery voltage

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Electrolysis and Storage Batteries
Chargmg of sulphated battery produces ____ heat.

less
no
very little
more

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