Neco 2025 Chemistry Question 21

Practice objective / multiple choice question 21 from the 2025 Neco Chemistry examination.

Neco 2025 Chemistry Objective / Multiple Choice Hard Difficulty

Question 21 NECO • 2025 • CHEMISTRY • objective

An aqueous solution contains a metal cation M^{2+} and an anion X^{-}. The following observations are recorded:\n1. Adding dilute HCl produces no precipitate.\n2. Adding NaOH yields a white precipitate that dissolves on addition of excess NaOH.\n3. Adding NH_{4}OH gives a white gelatinous precipitate that does not dissolve on excess.\n4. Adding AgNO_{3} produces a white precipitate which dissolves in dilute NH_{3}.\n5. The flame test shows no characteristic colour. Identify the metal cation and the anion present.

A. Cation: Zn^{2+}; Anion: Cl^{-}

B. Cation: Fe^{3+}; Anion: Cl^{-}

C. Cation: Al^{3+}; Anion: SO_{4}^{2-}

Correct Answer D. Cation: Al^{3+}; Anion: Cl^{-}

Correct Answer

Correct Option:

Cation: Al^{3+}; Anion: Cl^{-}

This is Neco 2025 Chemistry Question 21. It is one of the objective questions from the 2025 Neco Chemistry examination.

Difficulty level: Hard .

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