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On electrolysis of dil.sulphuric acid using Platinum (Pt) electrode, the product obtained at anode will be:
A
Oxygen gas
B
$H_2S$ gas
C
$SO_2$ gas
D
Hydrogen gas
Detailed Solution
During electrolysis of dilute sulphuric acid using Pt electrodes:
Cathode: $4H^+(aq) + 4e^- \rightarrow 2H_2(g)$
Anode: $2H_2O(l) \rightarrow O_2(g) + 4H^+(aq) + 4e^-$
So oxygen gas is obtained at the anode.