p-Block elementsHard
Question
What is true for hydrogen peroxide and ozone ?
Options
A.H2O2 acts as a stronger reducing agent in alkaline medium than in acidic medium
B.H2O2 and O3 both are oxidising agents as well as bleaching agent
C.H2O2 forms a hydrate, H2O2.H2O
D.Ozone is used in the manufacture of potassium permangnate from pyrolusite.
Solution
(A) In alkaline solution, its reducing character is more than in acidic medium.
H2O2 → O2 + 2H+ + 2e- ; 2OH- + H2O2 → O2 + 2H2O + 2e-
(B) Correct statements.
(C) Due to H-bonding it forms a hydrate H2O2.H2O (melting point 221 K).
(D) K2MnO4 + O3 + H2O → KMnO4 + 2KOH + O2
H2O2 → O2 + 2H+ + 2e- ; 2OH- + H2O2 → O2 + 2H2O + 2e-
(B) Correct statements.
(C) Due to H-bonding it forms a hydrate H2O2.H2O (melting point 221 K).
(D) K2MnO4 + O3 + H2O → KMnO4 + 2KOH + O2
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