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Describe the Theory of Manufacture of Sulphuric Acid by Contact Process, with All the Necessary Conditions (No Technical Details Are Required but Equations Should Be Given for Each Stage of Process). - Chemistry

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Short Note

Describe the theory of manufacture of sulphuric acid by contact process, with all the necessary conditions (No technical details are required but equations should be given for each stage of process).

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Solution

The theory of manufacture of sulphuric acid by contact process involves following steps:

i. Production of SO : SOis produced by burning sulphur or roasting iron pyrites.
        S + O2 → SO   Or
       4FeS2 + 11O2 → 2Fe2O3 + 8SO2

ii. Catalytic oxidation of SO2 by air to give sulphur trioxide: 
2SO2 + O2 ⇌ 2SO3 + Heat

iii. Absorption of sulphur trioxide in 98% sulphuric acid to form oleum:
SO3 + H2SO4 → H2S2O7

iv. Dilution of oleum to get sulphuric acid of desired concentration:
H2S2O7 + H2O → 2H2SO4

Concept: Manufacture of Sulphuric Acid (Constant Process)
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APPEARS IN

Frank ICSE Class 10 Chemistry Part 2
Chapter 10 Study of Sulphur Compound: Sulphuric Acid
Exercise | Q 2 | Page 249
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