O-LevelChemistryAcids, Bases & Salts5070/11 · May/June 2011 · Q191 Mark

A solution of fertiliser was tested as shown. Which ions must be present in the fertiliser?

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AFe2+ and SO42-

BFe3+ and NO3¯

CNH4+ and Fe2+

DNH4+ and NO3¯

✓ Correct answer

C: NH4+ and Fe2+

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Topic: Acids, Bases & Salts, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2011 Paper 1 Variant 1, question 19.

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