O-LevelChemistryChemistry of the Environment5070/11 · Oct/Nov 2020 · Q261 Mark
Some compounds containing nitrogen are used as fertilisers. The table shows some nitrogen-containing compounds, whether they are used as a fertiliser or not and a reason for this. Which row is correct?
Acompound: aqueous ammonia, NH3(aq), used as a fertiliser: yes, reason: lowers the pH of the soil
Bcompound: ammonium carbonate, (NH4)2CO3, used as a fertiliser: no, reason: is insoluble in water
Ccompound: ammonium chloride, NH4Cl, used as a fertiliser: yes, reason: is made from the products of the Haber process and the Contact process
Dcompound: ammonium nitrate, NH4NO3, used as a fertiliser: yes, reason: is soluble in water
✓ Correct answer
D: compound: ammonium nitrate, NH4NO3, used as a fertiliser: yes, reason: is soluble in water
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