Electrolysis and storage of batteries

compactness

lower e.m.f.

small quantity of electrolyte used

higher internal resistance

Its voltage increases

It gives out energy

Its cathode becomes dark chocolate brown in colour

Specific gravity of H2SO4 decreases

no

very little

less

more

nickel hydroxide

powdered iron and its oxide

21% solution of kOH

all of the above

resistance of electrolyte

electrode resistance

surface contact resistance between electrode and electrolyte

all above

Manganese-alkaline

Carbon-zinc

Lithium

Mercury

NaOH

KOH

HCl

HNO3

buckling of plates

faulty separators

lead particles forming circuit between positive and negative plates

excessive accumulation of sediment E. any one of above

corrosive fumes are produced

water is neither formed nor absorbed

nickel hydroxide remains unsplit

its e.m.f. remains constant

its chemical constituents

on the strength of its electrolyte

its temperature

all above