Q.

Which of the following is not an example of redox reaction?

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a

CuO+H2⟶Cu+H2O

b

Fe2O3+3CO⟶2Fe+3CO2

c

2 K+F2⟶2KF

d

BaCl2+H2SO4⟶BaSO4+2HCl

answer is D.

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Detailed Solution

Reaction Ba+2 Cl-12+H2S+6O4 →BaS+6O4+2HCl-1 Option (d) is not an example of redox reaction. Because in this reaction there is no change in oxidation number of the interacting species.
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