Neco 2023 Chemistry Question 13
Practice objective / multiple choice question 13 from the 2023 Neco Chemistry examination.
A sample is suspected to contain three cations chosen from Ba²⁺, Pb²⁺ and Fe³⁺. The following qualitative tests are performed on separate portions of the sample solution:\n\n1. Addition of dilute \(\mathrm{H_{2}SO_{4}}\) gives a white precipitate that does not dissolve in dilute \(\mathrm{HCl}.\)\n2. Addition of \(\mathrm{K_{2}CrO_{4}}\) produces a yellow precipitate which turns red on heating.\n3. Addition of excess \(\mathrm{NaOH}\) yields a brown precipitate that remains insoluble in excess \(\mathrm{NaOH}.\)\n\nIdentify all the cations present in the sample and justify each identification.
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About This Question
This is Neco 2023 Chemistry Question 13. It is one of the objective questions from the 2023 Neco Chemistry examination.
Difficulty level: Hard .
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