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Q.

In electrolysis of dilute $H_{2} {SO}_{4}$ , what is liberated at anode in presence of inert electrode?

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a

O₂

b

H₂

c

SO₃

d

SO₂

answer is D.

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Detailed Solution

At both the anode and the cathode during the electrolysis of a diluted sulfuric acid solution, gases are created.
When a sample is ignited with a lit splint, the gas generated at the cathode burns with a "pop." This demonstrates that hydrogen is the gas.
A blazing splint dipped into a sample of the gas ignites again when the gas created at the anode is applied. It is clear from this that the gas is oxygen.
At cathode,
2H⁺+2e⁻→H₂
At anode,
4OH⁻→2H₂O+O₂+4e⁻

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In electrolysis of dilute H2SO4, what is liberated at anode in presence of inert electrode?