2020 · Q3
Which one of the following chemical reactions is not feasible?
General KnowledgeChemistry
- AFe + CuSO → FeSO + Cu 4 4
- BZn + CuSO → ZnSO + Cu 4 4
- C→ Cu + PbCl CuCl + Pb 2 2
- DMg + CuSO → MgSO + Cu 4 4
Explanation
A metal can displace another metal from its salt solution only if it is higher in the reactivity series. Copper lies below lead in the reactivity series, so copper cannot displace lead from lead chloride. The other three reactions pair a more reactive metal (iron, zinc, magnesium) with copper salts, so they proceed normally. Hence Cu + PbCl2 -> CuCl2 + Pb is not feasible (C).