From the given reactions which is a redox reaction ?
(A) CuO(s) + H2O(g) → Cu(s) + H20(l)
(B) 2Cu(s) + 02(g) → 2Cuo(s)
(C) C(s) + 2H2(g) -->CH4(s)
(D) 4Al(s) + 302(g) ► 2Al203(s)
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An oxidation-reduction (redox) reaction is a type of chemical reaction that involves a transfer of electrons between two species. In redox reaction the oxidation number of a molecule, atom, or ion changes by gaining or losing an electron.
In the reaction : CuO+H 2
⟶Cu+H2O
in the reaction H 2
is oxidized since it has lost electrons and Cu is reduced since it has gained electrons.
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