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Question

The catalyst used in the manufacture of sulphuric acid by contact process is ________.

A
Al2O3
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B
V2O5
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C
Cr2O3
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D
MnO2
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Solution

The correct option is B V2O5
The contact process is the current method of producing sulfuric acid in the high concentrations needed for industrial processes. Platinum used to be the catalyst for this reaction, however as it is susceptible to reacting with arsenic impurities in the sulfur feedstock,Vanadium (V) oxide (V2O5) is now preferred.
2SO2(g)+O2(g)V2O5−−2SO3
So answer is B.

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