MEDIUM
Upper Secondary: IGCSE
IMPORTANT
Earn 100
Calcium sulfite from the process is often turned into gypsum. What is gypsum, and why do they make it?
Important Questions on Some Non-Metals and their Compounds
EASY
Upper Secondary: IGCSE
IMPORTANT
Say how hydrogen can be prepared in the lab.
EASY
Upper Secondary: IGCSE
IMPORTANT
Say how ammonia can be prepared in the lab.
HARD
Upper Secondary: IGCSE
IMPORTANT
Give two reactions for hydrogen and ammonia.
EASY
Upper Secondary: IGCSE
IMPORTANT
Give the equation for the reversible reaction between nitrogen and hydrogen.
EASY
Upper Secondary: IGCSE
IMPORTANT
Name the three main elements plants need from the soil, and say why they need them.
EASY
Upper Secondary: IGCSE
IMPORTANT
Explain what are fertilisers.
EASY
Upper Secondary: IGCSE
IMPORTANT
Say why fertilisers are needed.
EASY
Upper Secondary: IGCSE
IMPORTANT
Give examples of salts that act as fertilisers.
