Q1
How is ammonia prepared in the lab?
AHeating ammonium salt with a base
BHeating ammonium salt alone
CMixing nitrogen and oxygen
DHeating water with salt
ICSEClass 10 (ICSE)ChemistryCh 9 · Topic 1
Study of Compounds - Ammonia
Ammonia (NH3) is prepared in the laboratory and industrially, having distinct properties and important uses in fertilisers and other chemica
Core concept
Ammonia is prepared in the lab by heating an ammonium salt with a base, and industrially by the Haber process (nitrogen + hydrogen under high pressure/temperature with a catalyst).
How it works
Ammonia gas is colourless, has a pungent smell, is lighter than air, and is extremely soluble in water, forming ammonium hydroxide.
Why it matters
Ammonia acts as a weak base, turning red litmus blue, and reacts with acids to form ammonium salts.
Key detail
Ammonia is widely used in manufacturing fertilisers, as a refrigerant, and in the production of nitric acid and other chemicals.
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Quick notes
• Lab prep: heating ammonium salt with a base.
• Industrial prep: Haber process (N2+H2, catalyst).
• Ammonia gas: colourless, pungent smell.
• It's lighter than air, highly soluble in water.
• Dissolving forms ammonium hydroxide.
• Ammonia is a weak base, turns red litmus blue.
• It reacts with acids to form ammonium salts.
• Uses: fertilisers, refrigerant, nitric acid production.