Which of the following can undergo a chemical reaction ?

Last updated at Dec. 16, 2024 by

Which of the following can undergo a chemical reaction?

  1. MgSO 4 + Fe

  2. ZnSO 4 + Fe

  3. MgSO 2 + Pb

  4. CuSO 4 + Fe

 

Answer

  1. CuSO 4 + Fe

 

Explanation : The above reactions are potential Decomposition reactions.

They will proceed only in accordance with the reactivity series . 

It is a series of elements arranged in decreasing order of reactivity.

(Most reactive on top, least reactive on bottom)

K > Na > Ca > Mg > Al > Zn > Fe > Pb > H > Cu > Hg > Ag > Au

 

Since Fe is more reactive than Cu (Fe placed before Cu in reactivity series), Fe displaces Cu .

 

Other options are incorrect as, based on the positions in the reactivity series, Fe can’t displace Mg, Fe can’t displace Zn and Pb can’t displace Mg.

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