Question

Which of the following can undergo a chemical reaction ?

• A. $MgS{O}_4+Fe$
• B. $ZnS{O}_4+Fe$
• C. $MgS{O}_4+Pb$
• D. $CuS{O}_4+Fe$

Answer 1

The correct option is D $CuS{O}_4+Fe$

The Reactivity series is an arrangement of metals in the order of decreasing reactivities. We can infer that a more reactive metal displaces a less reactive metal from a solution of its salt.

$K>Na>Ca>Mg>Al>Zn>Fe>Pb>H>Cu>Hg>Ag>Au$

From the reactivity series, it is clear that $Fe$ is more reactive than $Cu$ and can replace $Cu$. But in the case of $Mg$ and $Zn$, we find that they are more reactive than $Fe$ and same in the case of $Mg$ and $Pb$ where $Mg$ is more reactive than $Pb$.

Hence, the reaction of $CuS{O}_4$ and $Fe$ is possible.