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Which of the following chemical reactions is not an oxidation-reduction reaction?


CuSO4 + BaCl2 yields BaSO4 + CuCl2


N2 + 3H2 yields 2NH3


Zn + H2SO4 yields ZnSO4 + H2


2Na + Cl 2 yields 2NaCl

Verified Answer :

the answer to this is A

Hagrid

The chemical reaction
\(CuSO_{4} + BaCl_{2} yields BaSO_{4} + Cu Cl_{2}\)
 is not an oxidation-reduction reaction because there is no trasfer of electrons. The following are the oxidation numbers of the species involved:
Reactants side: 
Cu = +2
Sulfate ion = -2
Cl2 = -2
Ba = +2

Products side:
Cu = +2
Sulpahte Ion = -2
Cl2 = -2
Ba = +2

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