O-LevelChemistryBonding & Structure5070/11 · Oct/Nov 2024 · Q71 Mark

Chrome alum is a salt that contains two different cations and one anion. The ions present in chrome alum are K+, Cr3+ and SO42-. What is the formula of the salt?

AKCrSO4

BKCr(SO4)2

CKCr(SO4)3

DK2Cr(SO4)3

✓ Correct answer

B: KCr(SO4)2

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Topic: Bonding & Structure, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2024 Paper 1 Variant 1, question 7.

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