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KCET2014ChemistryAlcohols Phenols and Ethers

( 50 ~cm ³ ) of ( 0.04 M K ₂ Cr ₂ O ₇ ) in acidic medium oxidizes a sample of ( H ₂ ~S ) gas to sulphur. Volume of ( 0.03 M KMnO ₄ ) required to oxidize the same amount of ( H ₂ ~S ) gas to sulphur, in acidic medium is

Options

  1. A( 80 ~cm ³ )
  2. B( 120 ~cm ³ )
  3. C( 60 ~cm ³ )
  4. D( 90 ~cm ³ )

Correct answer

A. ( 80 ~cm ³ )

Step-by-step solution

Equivalents of ( K ₂ Cr ₂ O ₇= ) Equivalents of ( H ₂ ~S = ) Equivalents of ( KMnO ₄ ) (n_ f ) of ( K ₂ Cr ₂ O ₇=6 ) (n_ f ) of ( KMnO ₄=5 ) Equivalents (=n_ f ) Molarity ( ) Volume (6 0.04 50=5 0.03 V_ K M n O₄ ) (V_ K M n O₄ =80 ~cm ³ )

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