1)Why are the substanceslike platinum and palladium often used for carrying out electrolysis of aqueous solutions?

Generally all metals are acting as  a carrying out electolysis of aqueous solutions.

Substance like platinum and palladium often often used for carrying out electrolysis of aqueous solution due to the folloeing reasons:

i)chemical internes.platinum and palladium are chemically inert

ii)Absorbed capacity:platinum and palladium hace good adsorbate capacity for hydrogen .

Approved

Enter your answer here... From my point platinum and palladium are ions hence which carry charge during electrolysis better than any elements carry ions