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Chemistry · Oct / Nov 2024 · Paper 11 · Question 7

5070Formulae

Chrome alum is a salt that contains two different cations and one anion. The ions present in chrome alum are K+, Cr3+ and SO4 2–. What is the formula of the salt?

  1. AKCrSO4
  2. BKCr(SO4)2
  3. CKCr(SO4)3
  4. DK2Cr(SO4)3

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Correct answer: B. KCr(SO4)2

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