When dilute $H_{2} S O_{4}$ is electrolysed at room temperature between Pt electrodes. The substance liberated at anode is:

S

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S O_{3}

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H_{2}

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O_{2}

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Solution

The correct option is B $O_{2}$
At anode, $S O_{4}^{2 -}$ ions and $O H^{-}$ ions are migrated, $O H^{-}$ ions get preference to get oxidised due to its higher oxidation potential.
$O H^{-}$ gets reduced to give oxygen.
$4 O H^{-} + 4 e^{-} \to 2 H_{2} O + O_{2}$

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When dilute H2SO4 is electrolysed at room temperature between Pt electrodes. The substance liberated at anode is:

The correct option is B O2At anode, SO2−4 ions and OH− ions are migrated, OH− ions get preference to get oxidised due to its higher oxidation potential.OH− gets reduced to give oxygen.4OH−+4e−→2H2O+O2

When dilute $H_{2} S O_{4}$ is electrolysed at room temperature between Pt electrodes. The substance liberated at anode is:

The correct option is B $O_{2}$
At anode, $S O_{4}^{2 -}$ ions and $O H^{-}$ ions are migrated, $O H^{-}$ ions get preference to get oxidised due to its higher oxidation potential.
$O H^{-}$ gets reduced to give oxygen.
$4 O H^{-} + 4 e^{-} \to 2 H_{2} O + O_{2}$