What happens when copper rod is dipped in iron sulphate solution?

The correct option is C

No reaction takes place

Explanation:

• Arrangement of the metals on the basis of their reactivity towards other elements is termed as activity series. Elements at the top of this series are comparatively more reactive than elements below in the series.
• In a single displacement reaction, a more reactive element displaces a less reactive element from its compound to form two product species. Elements present above in the activity series can displace the element present below it in the series.
• Since Iron $\left(\mathrm{Fe}\right)$ is present above Copper$\left(\mathrm{Cu}\right)$ in the activity series thus, Copper$\left(\mathrm{Cu}\right)$ cannot displace Iron from Iron sulfate $\left({\mathrm{FeSO}}_4\right)$ and hence, no reaction takes place.

Final Answer:

Hence, the correct option is C.