JEE Mains · Chemistry · STD 11 - 7. Redox reactions
Hydrogen peroxide acts both as an oxidising and as a reducing agent depending upon the nature of the reacting species . In which of the following cases \(H_2O_2\) acts as a reducing agent in acid medium?
- A \(MnO_4^-\)
- B \(Cr_2O_7^{2-}\)
- C \(SO_3^{2-}\)
- D \(KI\)
Answer & Solution
Correct Answer
(A) \(MnO_4^-\)
Step-by-step Solution
Detailed explanation
\(H_2O_2\) acts as a reducing agent only in presence of strong oxidising agents (\(i.e.,MnO_4^-\) ) in acidic as well as alkaline medium. \(2KMnO_4 + 3H_2SO_4 + 5H_2O_2 \to K_2SO_4 + 2MnSO_4 + 8H_2O + 5O_2\)
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