A. chromium(vi)oxide
B. iron(iii)oxide
C. copper(i)oxide
D. vanadium(v)oxide

Correct Answer:

Option D = vanadium(v)oxide

Explanation

During the Contact Process for manufacturing sulfuric acid, sulfur dioxide has to be converted into sulfur trioxide, which is done by passing sulfur dioxide and oxygen over a solid vanadium(V) oxide catalyst.

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