Question

In the electolaysis of water : a}name the gas collected at cathode and anode b}why is volume of one gas collected at one electrode is double of another?c}why are few drops dil.H2SO4 added to water?

Answer 1

in electrode ..
one is anode +ve charged
one is cathode -ve charged
(remember t is similar to +sign and t comes in cathode ... for remembering )
on cathode Hydrogen comes because on ionisation H2O forms H+ and O-

other ie oxygen comes at Anode .
H2So4 is poured in water to make water good conductor

one gas is double the other because H2O is formed by combination of 2 parts of H by mass with 1 part of O by mass.

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Answer 2

Answer:

In electrolysis of water :

a ) . Hydrogen gas collected at cathode. And oxygen gas gas collect at anode.

b ) . We know that in water there is 2 hydrogen atom and 1 oxygen atom. That's why volume of gas collected at one electrode double than the other.

c ) . Pure water is a bad conductor of electricity when we add drops of dil sulphuric acid we make it a good conductor of electricity.