Which of the following can undergo a chemical reaction?

(A) MgSO 4 + Fe

(B) ZnSO 4 + Fe

(C) MgSO 4 + Pb

(D) CuSO 4 + Fe

 

Answer.:

Let's go through the options

Chemical reactions only occur when the element being displaced is less reactive than the one trying to displace it.

We can know the reactivities of the metals here from the reactivity series .

  • Between Mg and Fe, since Fe is less reactive than Mg , it cannot displace Mg from its salt solution.
  • Between Zn and Fe, since Fe is less reactive than Zn , it cannot  displace Zn from its salt solution.
  • Between Mg and Pb, since Pb is less reactive than Mg , it cannot  displace Mg from its salt solution.
  • Between Cu and Fe, since Fe is more reactive than Cu , it can displace Cu from its salt solution.

 

So, the correct answer is (d) CuSO 4 + Fe

  1. Class 10
  2. Chapter 3 Class 10 - Metals and Non-Metals (Term 1)

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CA Maninder Singh
CA Maninder Singh is a Chartered Accountant for the past 11 years and a teacher from the past 11 years. He teaches Science, Accounts and English at Teachoo