Hydrogen And Its Compounds Question 31
Question: 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-
Options:
A) $ MnO_4^{-} $
B) $ Cr_2O_7^{2-} $
C) $ SO_3^{2-} $
D) KI
Show Answer
Answer:
Correct Answer: A
Solution:
[a] $ 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\xrightarrow{{}} $
$ K_2SO_4+2MnSO_4+8H_2O_2+5O_2 $
BETA
