Redox Reactions

Step 1: Concept
Equivalent weight = Molecular Weight / n-factor (change in oxidation state).
Step 2: Reaction in Acidic Medium
In acidic medium, is reduced to . The half-reaction is: .
Step 3: n-factor
The oxidation state of Mn changes from +7 in to +2 in . The change in oxidation state ( ) is 5.
Step 4: Calculation
The molecular weight of is 158 g/mol. Equivalent Weight .
Final Answer: (D)

Step 1: Understanding the Concept:
Oxidising strength of oxoacids of chlorine increases with increase in oxidation state of Cl.

Step 2: Detailed Explanation:
Oxidation states: HOCl (Cl = +1), HClO (Cl = +3), HClO (Cl = +5), HClO (Cl = +7). Higher oxidation state means greater tendency to get reduced, hence stronger oxidising agent. So HClO is strongest.

Step 3: Final Answer: