NEET Chemistry Functional Group Tests MCQ Question
Which of the following combinations correctly describes tests related to functional groups in qualitative analysis?
Lead chromate precipitate confirms Pb2+ ions and is soluble in hot NaOH.
Aluminium hydroxide forms a blue lake in acidic solutions and is soluble in excess NaOH.
Ferric ions produce a reddish brown precipitate only in alkaline solutions.
Lead sulfate precipitate forms with alcohol and is soluble in ammonium acetate.
Correct Answer
Detailed Explanation
Lead chromate (PbCrO4) confirms the presence of Pb2+ ions and is indeed soluble in hot NaOH, as stated in the NCERT context. Option B is incorrect because the blue lake forms in alkaline conditions, while C is incorrect as ferric ions form a reddish brown precipitate in both acidic and neutral solutions. Option D contains a mistake regarding the solubility of lead sulfate.
Found an issue with this question?
Related Questions
More from Functional Group Tests
What white precipitate is formed when calcium chloride solution is added to an acidified sodium carbonate extract containing oxalate ions?
Which of the following statements about functional group tests are correct?
Which of the following statements correctly describes the functional group tests for the presence of certain ions?
More from
Assertion (A): The evolution of violet vapors when MnO2 is added to a reaction mixture containing NaI and H2SO4 indicates the presence of iodide ions....
What color indicates the presence of Cu²⁺ ions when observed in a heating test?
Assertion (A): The presence of iodide ions can be confirmed by the violet color in the organic layer. | Reason (R): Iodine dissolves in the organic so...