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What is the catalyst used in contact process in the conversion of Sulphur dioxide to Sulphur trioxide?

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in Chemistry – Class 12 by (188k points)
What is the catalyst used in contact process in the conversion of Sulphur dioxide to Sulphur trioxide?

(a) Finely divided iron

(b) Molybdenum

(c) Vanadium pentoxide

(d) Platinum

I have been asked this question in final exam.

Origin of the question is P-Block Elements topic in section P-Block Elements of Chemistry – Class 12

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The correct choice is (c) Vanadium pentoxide

To explain: After burning Sulphur in the presence of oxygen the formed Sulphur dioxide needs to be reacted with oxygen to form Sulphur trioxide. It is an exothermic reaction and vanadium pentoxide is used as the catalyst.

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