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AIIMS 2005
Exam
AIIMS
Year
2005
Subject
Chemistry
Chapter
p Block Elements (Group 15, 16, 17 & 18)

AIIMS 2005 · Chemistry · p Block Elements (Group 15, 16, 17 & 18)

Assertion : Reaction of SO_2 and H_2 ~S in the presence of Fe_2 O_3...

Assertion : Reaction of SO2\mathrm{SO}_2 and H2 S\mathrm{H}_2 \mathrm{~S} in the presence of Fe2O3\mathrm{Fe}_2 \mathrm{O}_3 catalyst gives elemental sulphur. Reason : SO2\mathrm{SO}_2 is a reducing agent.

Options

  1. AIf both assertion and reason are true and reason is the correct explanation of assertion
  2. BIf both assertion and reason are true but reason is not the correct explanation of assertion
  3. CIf assertion is true but reason is false
  4. DIf both assertion and reason are false.

Correct answer

B. If both assertion and reason are true but reason is not the correct explanation of assertion

Step-by-step solution

SO2\mathrm{SO}_2 shows both oxidising as well as reducing nature. The reaction given in assertion is due to oxidising nature of SO2\mathrm{SO}_2. 2H2 S+SO2→2H2O+3 S2 \mathrm{H}_2 \mathrm{~S}+\mathrm{SO}_2 \rightarrow 2 \mathrm{H}_2 \mathrm{O}+3 \mathrm{~S}
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