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Q.

In electrolysis of dilute H2SO4, 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−→2H2​O+O2​+4e−
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