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Question

Which of the following is the rate-determining step of the idustrial preparation of sulphuric acid?


A

Formation of SO2

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B

Formation of SO3

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C

Formation of oleum

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D

Dilutiion of oleum

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Solution

The correct option is B

Formation of SO3


The oxidation of SO2 to SO3 is a reversible process and hence very slow. So it is the rate determining step in the manufacture of sulphuric acid as it bottlenecks the speed of the entire process


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