Question

In the given reaction, $M_A$ is a metal A and $M_B$ is a metal B. Choose the correct options regarding the reactivities of $M_A$ and $M_B$.
$M_A+Saltof{M}_B$
$\to M_B+Saltof{M}_A$

• A. $M_A$ is more reactive than $M_B$
• B. $M_B$ is more reactive than $M_A$
• C. $M_A$ and $M_B$ are equally reactive
• D. There is not enough information to determine which metal is more reactive

Answer 1

The correct option is A

$M_A$ is more reactive than $M_B$

Highly reactive metals can displace relatively less reactive metals from their salt solutions. In the above reaction, since $M_A$ is able to displace $M_B$ from its salt solution (salt of $M_B$), $M_A$ is considered to be more reactive than $M_B$.