The decomposition of hydrogen peroxide is faster in the presence of

Kingsley Thompson February 08, 2026

 The decomposition of hydrogen peroxide is faster in the presence of 

A. manganese (IV) oxide

B. Vanadium (V) oxide

C. Iron

D. Nickel

The correct answer is A. Manganese (IV) oxide ✅


Explanation:


Hydrogen peroxide (H₂O₂) decomposes into water and oxygen:


2H_2O_2 -> 2H_2O + O_2


This reaction is slow on its own but becomes faster in the presence of a catalyst.


Manganese (IV) oxide (MnO₂) acts as a catalyst, speeding up the decomposition without being used up.

Why others are incorrect:

Vanadium (V) oxide→ catalyst in Contact process (SO₂ → SO₃)

Iron → used in Haber process

Nickel → used in hydrogenation of oil


Final Answer: A. Manganese (IV) oxide

PQN: 2

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Kingsley Thompson

Posted by: Kingsley Thompson

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