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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
nickel hydroxide
powdered iron and its oxide

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Electrolysis and Storage Batteries
Cells are connected in series in order to

increase the voltage rating
increase the current rating
increase the life of the cells
None of the listed here

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Electrolysis and Storage Batteries
Which of the following primary cells has the lowest voltage ?

Lithium
Zinc-chloride
Carbon-zinc
Mercury

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

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

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Electrolysis and Storage Batteries
Cells are connected in parallel to

Increase the voltage output
Increase the current capacity
Increase the internal resistance
Increase the efficiency

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Electrolysis and Storage Batteries
Life of the Edison cell is at least

five years
seven years
eight years
ten years

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