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Electrolysis and Storage Batteries

Electrolysis and Storage Batteries
The watt-hour efficiency of a lead-acid cell varies between

90 to 95%
25 to 35%
40 to 60%
70 to 80%

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Electrolysis and Storage Batteries
It is noticed that durum charging

all of these
there is a rise in voltage
energy is absorbed by the cell
the anode becomes chocolate brown in colour (PbCfe) and cathode becomes grey metallic lead (Pb)

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Electrolysis and Storage Batteries
A dead storage battery can be revived by

a dose of H₂SO₄
adding so-called battery restorer
none of the listed here
adding distilled water

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Electrolysis and Storage Batteries
_______ of electrolyte indicates the state of charge of the battery

viscosity
specific gravity
colour
mass

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Electrolysis and Storage Batteries
Which of the following has lower sp. gravity V

Water
Concentrated H₂SO₄
Dilute H₂SO₄
All of the listed here

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Electrolysis and Storage Batteries
The capacity of a lead-acid cell does not depend on its

quantity of active material
rate of charge
rate of discharge
temperature

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