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A highly concentrated solution of potass...

A highly concentrated solution of potassium sulphate in water is electrolysed using inert electrodes.The products at the cathode and anode are respectively.
(a) `H_(2),O_(2)`
(b) `O_(2,)H_(2),`
(c) `O_(2)`, Na
(d) `H_(2),S_(2)O_(8)^(2-)`

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