Question

Given below is a redox reaction. Which of the following types the reaction belong to?
$\stackrel{+2+6-2}{CuS{O}_{4\left(aq\right)}}+\stackrel{0}{Z{n}_{\left(s\right)}}\to \stackrel{0}{C{u}_{\left(s\right)}}+\stackrel{+2+6+-2}{ZnS{O}_{4\left(aq\right)}}$

• A. Combination reaction
• B. Decomposition reaction
• C. Metal displacement reaction
• D. Non - metal displacement reaction

Answer 1

Answer: (C)

Metal displacement reaction

$\stackrel{+2+6-2}{CuS{O}_{4\left(aq\right)}}+\stackrel{0}{Z{n}_{\left(s\right)}}\to \stackrel{0}{C{u}_{\left(s\right)}}+\stackrel{+2+6+-2}{ZnS{O}_{4\left(aq\right)}}$

Here a change in oxidation state of $Cu$ and $Zn$ is from +2 to 0 and vice-versa.Also, $Cu$ is displaced from its salt $CuS{O}_4$ by $Zn$. Thus its an example of metal displacement reaction where $Cu$ is displaced by $Zn$.