Neco 2022 Chemistry Question 47

Practice objective / multiple choice question 47 from the 2022 Neco Chemistry examination.

Neco 2022 Chemistry Objective / Multiple Choice Hard Difficulty
Question 47 NECO • 2022 • CHEMISTRY • objective

A 0.10\,M aqueous solution of an unknown chloride salt is treated with excess aqueous AgNO\(_3\), producing a white precipitate that dissolves completely on addition of excess dilute NH\(_3\). The filtrate is then acidified with dilute HNO\(_3\) and H\(_2\)S gas is passed, giving a black precipitate. Identify the cation present in the salt.

Answer Options

A. Copper(I) ion, \(\text{Cu}^{+}\)
B. Lead(II) ion, \(\text{Pb}^{2+}\)
C. Silver ion, \(\text{Ag}^{+}\)
Correct Answer D. Mercury(I) ion, \(\text{Hg}_{2}^{2+}\)
Correct Answer
D
Correct Option:
Mercury(I) ion, \(\text{Hg}_{2}^{2+}\)

About This Question

This is Neco 2022 Chemistry Question 47. It is one of the objective questions from the 2022 Neco Chemistry examination.

Difficulty level: Hard .

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