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Electrolysis and Storage Batteries

Electrolysis and Storage Batteries
Which of the following cell has a reversible chemical reaction ?

Lead-acid
Silver-oxide
Carbon-zinc
Mercury oxide

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Electrolysis and Storage Batteries
On overcharging a battery

It will raise the specific gravity of the electrolyte
It will bring about chemical change in active materials
None of these
It will increase the capacity of the battery

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Electrolysis and Storage Batteries
Cell short circuit results in

reduced gassing on charge
low sp. gravity electrolyte
all of the listed here
abnormal high temperature

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Electrolysis and Storage Batteries
It is noticed that during discharging the following does not happen

voltage of the cell decreases
both anode and cathode become PbS04
specific gravity of H2SO4 decreases
the cell absorbs energy

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Electrolysis and Storage Batteries
In a lead-acid battery the energy is stored in the form of

charged ions
chemical energy
electromagnetic energy
electrostatic energy

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Electrolysis and Storage Batteries
In a lead-acid cell dilute sulfuric acid (electrolyte) approximately comprises the following

two parts H2O, two parts H₂SO₄
one part H2O, three parts H₂SO₄
all H₂SO₄
three parts H2O, one part H₂SO₄

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