Q.

When very dilute solution of sodium hydroxide is electrolysed using platinum electrodes, then

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hydrogen is evolved at cathode

hydrogen is evolved at anode

sodium is obtained at cathode

oxygen is produced at anode

answer is A.

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Detailed Solution

NaOH⟶Na++OH−At anode - 2H2O⟶O2+4H++4e−At cathode - H++e−⟶12H2

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