JAMB Mathematics 2022 Objective — Question 11
Question 11 of 41 from the Joint Admissions and Matriculation Board (JAMB) Mathematics 2022 Objective paper, with the correct answer and a full explanation.
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A piece of filter paper moistened with lead(ii) ethanoate turns black when the paper is dropped into a gas likely to be
- A. Sulphur(vi) oxide
- B. Hydrogen sulphideCorrect
- C. Sulphur(iv) oxide
- D. Hydrogen chloride
Explanation
H₂S + Pb(CH₃COO)₂ → PbS (black precipitate) + 2CH₃COOH. Lead ethanoate paper turning black is the test for hydrogen sulphide.
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