Which one of the following chemical reactions is not feasible?
[amp_mcq option1=”Fe + CuSO₄ → FeSO₄ + Cu” option2=”Zn + CuSO₄ → ZnSO₄ + Cu” option3=”Cu + PbCl₂ → CuCl₂ + Pb” option4=”Mg + CuSO₄ → MgSO₄ + Cu” correct=”option3″]
This question was previously asked in
UPSC CDS-1 – 2020
– A) Fe + CuSO₄: Fe is more reactive than Cu. Fe displaces Cu. Feasible.
– B) Zn + CuSO₄: Zn is more reactive than Cu. Zn displaces Cu. Feasible.
– C) Cu + PbCl₂: Cu is less reactive than Pb. Cu cannot displace Pb. Not feasible.
– D) Mg + CuSO₄: Mg is more reactive than Cu. Mg displaces Cu. Feasible.