Question

Which of the following metals will satisfy the given reaction?
$\text{M(s) +}$ $\text{PbCl}$${}_2\left(aq\right)$ $\to$ $\text{Pb(s) +}$ $\text{MCl}$${}_2\left(aq\right)$

i. Mg; ii. Ag; iii. Zn; iv. Fe

• A. i and ii
• B. i, ii and iv
• C. iii and iv
• D. i, iii and iv

Answer 1

The correct option is D i, iii and iv

In displacement reactions, a metal with higher reactivity displaces a metal with lower reactivity from its salt solution.

Magnesium, zinc and iron being more reactive than lead can displace lead from the lead chloride solution.

Silver being less reactive would fail to displace lead from the lead chloride solution, and would not satisfy the given reaction.