Question

name the cation which is discharged at the cathode readily​

Answer 1

When dilute sodium chloride is electrolysed using graphite electrodes, the cation is discharged at the cathode most readily.

Answer 2

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Cathode is an electrode which is connected with the negative terminal of the battery. Hence, positive ions will migrate towards the cathode and get converted to neutral atoms by gaining electrons. Hence,$NA +$ions migrates towards the cathode.