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Question

The catalyst used in the industrial preparation of sulphuric acid is


A
Manganese dioxide
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B
Vanadium pentoxide
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C
Phosphoric acid
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D
Iron
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Solution

The correct option is B Vanadium pentoxide

A catalyst is a substance which alters the rate of the chemical reaction without itself undergoing any chemical change. There are two types of catalysts:

(a) Positive catalyst: Catalyst which increases the rate of the reaction.

(b) Negative catalyst: Catalyst which decreases the rate of the reaction.

Vanadium pentoxide is a positive catalyst used in the industrial preparation of sulphuric acid. The reaction for the industrial preparation of sulphuric acid is:

2SO2(g)+O2(g)V2O52SO3(g)+Heat


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