Neco 2022 Chemistry Question 4

Practice objective / multiple choice question 4 from the 2022 Neco Chemistry examination.

Neco 2022 Chemistry Objective / Multiple Choice Hard Difficulty
Question 4 NECO • 2022 • CHEMISTRY • objective

A metal M forms a nitrate solution that reacts spontaneously with solid copper metal, producing a blue solution and depositing copper metal. Given the standard reduction potentials: \(\mathrm{M^{2+}+2e^- \rightarrow M}\)  E° = -0.13 V, \(\mathrm{Cu^{2+}+2e^- \rightarrow Cu}\)  E° = +0.34 V. Identify the metal M and write the balanced redox equation for the reaction.

Answer Options

A. Metal M is zinc (Zn); balanced equation: Zn^{2+}(aq) + Cu(s) → Zn(s) + Cu^{2+}(aq)
Correct Answer B. Metal M is lead (Pb); balanced equation: Pb^{2+}(aq) + Cu(s) → Pb(s) + Cu^{2+}(aq)
C. Metal M is nickel (Ni); balanced equation: Ni^{2+}(aq) + Cu(s) → Ni(s) + Cu^{2+}(aq)
D. Metal M is iron (Fe); balanced equation: Fe^{2+}(aq) + Cu(s) → Fe(s) + Cu^{2+}(aq)
Correct Answer
B
Correct Option:
Metal M is lead (Pb); balanced equation: Pb^{2+}(aq) + Cu(s) → Pb(s) + Cu^{2+}(aq)

About This Question

This is Neco 2022 Chemistry Question 4. It is one of the objective questions from the 2022 Neco Chemistry examination.

Difficulty level: Hard .

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