Neco 2019 Chemistry Question 5

Practice objective / multiple choice question 5 from the 2019 Neco Chemistry examination.

Neco 2019 Chemistry Objective / Multiple Choice Hard Difficulty

Question 5 NECO • 2019 • CHEMISTRY • objective

A sample of an aqueous solution contains one of the following metal ions: \(\mathrm{Fe^{3+}}\), \(\mathrm{Cu^{2+}}\) or \(\mathrm{Zn^{2+}}\). The following observations are made: 1. Addition of dilute NaOH produces a pale blue precipitate that dissolves on adding excess NaOH. 2. Addition of concentrated \(\mathrm{NH_3}\) to the solution after step 1 gives a deep blue solution that remains unchanged on further addition of \(\mathrm{NH_3}\). Identify the metal ion present in the original solution.

A. Ni^{2+}

B. Fe^{3+}

Correct Answer C. Cu^{2+}

D. Zn^{2+}

Correct Answer

Correct Option:

Cu^{2+}

This is Neco 2019 Chemistry Question 5. It is one of the objective questions from the 2019 Neco Chemistry examination.

Difficulty level: Hard .

You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.

Unlock Full Access Available for Android & Windows

Chat with Support