HARD
Upper Secondary: IGCSE
IMPORTANT
Earn 100

400 atmospheres and 250 °C would give a high yield. Why are these conditions not used in the Haber process?

Important Questions on Some Non-Metals and their Compounds

EASY
Upper Secondary: IGCSE
IMPORTANT
Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 16 - Some Non-Metals and their Compounds>Q>Q 3

What is the % yield of ammonia at 200 atmospheres and 450 °C? (Use the graph.)

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HARD
Upper Secondary: IGCSE
IMPORTANT
Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 16 - Some Non-Metals and their Compounds>Q>Q 3
What happens to the unreacted gases in Haber process ?
EASY
Upper Secondary: IGCSE
IMPORTANT
Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 16 - Some Non-Metals and their Compounds>Q>Q 1
You can buy a mixture of fertilisers called NPK fertiliser. It contains elements plants need. Why do you think it is called NPK?
EASY
Upper Secondary: IGCSE
IMPORTANT
Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 16 - Some Non-Metals and their Compounds>Q>Q 2
Nitrogenous fertilisers are fertilisers that contain nitrogen. Name three nitrogenous fertilisers.
EASY
Upper Secondary: IGCSE
IMPORTANT
Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 16 - Some Non-Metals and their Compounds>Q>Q 3
Fertilisers can harm river life. Explain how.
EASY
Upper Secondary: IGCSE
IMPORTANT
Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 16 - Some Non-Metals and their Compounds>Q>Q 4

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The box in the margin above will remind you how to work out % composition. Find the % of nitrogen in ammonium sulphate.

MEDIUM
Upper Secondary: IGCSE
IMPORTANT
Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 16 - Some Non-Metals and their Compounds>Q>Q 4
Which would provide more nitrogen: 1 kg of ammonium nitrate or 1 Kg of ammonium sulphate?
MEDIUM
Upper Secondary: IGCSE
IMPORTANT
Complete Chemistry for Cambridge IGCSE® Second Edition>Chapter 16 - Some Non-Metals and their Compounds>Q>Q 4
Make sure not to add fertilisers in the rainy season. Why not?