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प्रश्न
On electrolysis of dilute sulphuric acid using platinum electrodes, the product obtained at the anode will be ______.
पर्याय
Hydrogen gas
Oxygen gas
Hydrogen sulphide (H2S) gas
Sulphur dioxide (SO2) gas
MCQ
रिकाम्या जागा भरा
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उत्तर
On electrolysis of dilute sulphuric acid using platinum electrodes, the product obtained at the anode will be oxygen gas.
Explanation:
Dissociation of sulfuric acid,
\[\ce{H2SO4 -> 2H^+_{ (aq)} + SO^{-2}_{4{ (aq)}}}\]
Dissociation of water,
\[\ce{H2O -> H{^{+}_{(aq)}} + OH^-_{ (aq)}}\]
At Anode: \[\ce{4OH- -> 2H2O_{(l)} + O2_{(g)} + 4e-}\]
At Cathode: \[\ce{2H^+_{ (aq)} + 2e- -> H2_{(g)}}\]
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