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Chemical industries
5 Class 10 Chemistry questions with answers and explanations.
Printable worksheet with answer key
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Urea is mainly used as a:
- 1 Fertiliser
- 2 Dye
- 3 Explosive
- 4 Fuel
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The Solvay process is used to manufacture:
- 1 Sodium carbonate
- 2 Ammonia
- 3 Urea
- 4 Sulphuric acid
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Correct answer: Sodium carbonate
Sodium carbonate (soda ash) is made by the Solvay process.
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Sulphuric acid is made industrially by the:
- 1 Cracking
- 2 Solvay process
- 3 Contact process
- 4 Haber process
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Correct answer: Contact process
The contact process uses a vanadium oxide catalyst.
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Crude petroleum is separated into fractions by:
- 1 Crystallisation
- 2 Filtration
- 3 Fractional distillation
- 4 Electrolysis
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Correct answer: Fractional distillation
The fractions have different boiling points.
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Cement is made by heating limestone with:
- 1 Salt
- 2 Sugar
- 3 Clay
- 4 Coal tar
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Correct answer: Clay
Limestone and clay are heated in a kiln and ground to make cement.