On heating iron pyrite, gas is released, which is used in the production of sulphuric acid.

carbon dioxide

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iron oxide

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sulphur trioxide

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sulphur dioxide

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Solution

The correct option is D sulphur dioxide
Iron pyrite or iron sulphide on heating produces iron (III) oxide and sulphur dioxide gas. This sulphur dioxide can be used for producing sulphuric acid.
$4 {FeS}_{2} (s) + 11 O_{2} + Heat \to 2 {Fe}_{2} O_{3} (g) + 8 {SO}_{2} (g)$
Hence, in Contact Process, iron pyrite is used as a raw material in the production of sulphur dioxide.

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Similar questions

Which of the following statement(s) is/are correct when iron reacts with concentrated sulphuric acid?

i. Hydrogen gas is released.

ii. The compound formed is ferric sulphate.

iii. Sulphur dioxide gas is released.

N O_{2}

N H_{4} N O_{3}, K N O_{3}, N a N O_{2}, P b (N O_{3})_{2}, A g N O_{3}

(a) Name the acid formed when sulphur dioxide dissolves in water.

(b) Name the gas released when sodium carbonate is added to a solution of sulphur dioxide.

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