AIIMS2011ChemistryRedox Reactions
Assertion : Chlorine undergoes disproportionation reaction in alkaline medium. Reason : Cl ₂ is an oxidising agent.
Options
- AIf both assertion and reason are true and reason is the correct explanation of assertion.
- BIf both assertion and reason are true but reason is not the correct explanation of assertion.
- CIf assertion is true but reason is false.
- 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
aligned & : Cl ₂+2 NaOH (dil.) cold & 3 Cl ₂+6 NaOH (conc.) 5 NaCl heat + NaOCl + H ₂ O & NaClO ₃+3 H ₂ O aligned Chlorine undergoes the simultaneous oxidationreduction. Chlorine is simultaneously reduced to chloride ion ( Cl ⁻ ) and is oxidised to either ClO ⁻ or ClO ₃⁻ ion. Halogens (e.g. Cl) have a strong tendency to accept electrons, so they act as strong oxidising agents.