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Question

State which of the following are oxidation reactions and which are reduction reactions.
(a) (i) Cu ⟶ Cu2+ + 2e-
(ii) Cu2+ + 2e- ⟶ Cu
(iii) Sn4+ + 2e- ⟶ Sn2+
(iv) 2Cl- ⟶ Cl2 + 2e-
(v) Fe2+ ⟶ Fe3+ + 1e-
(vi) X + 2e- ⟶ X2-
(vii) Y – 1e- ⟶ Y1+
(viii) Z3+ + 1e- ⟶ Z2+
(b) (i) Zn ⟶ Zn2+
(ii) S ⟶ S2-
(iii) Sn2+ ⟶ Sn
(iv) Fe2+ ⟶ Fe3+

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Answer

(i) Cu ⟶ Cu2+ + 2e–Oxidation Reaction
(ii) Cu2+ + 2e– ⟶ CuReduction Reaction
(iii) Sn4+ + 2e– ⟶ Sn2+Reduction Reaction
(iv) 2Cl– ⟶ Cl2 + 2e–Oxidation Reaction
(v) Fe2+ ⟶ Fe3+ + 1e–Oxidation Reaction
(vi) X + 2e– ⟶ X2-Reduction Reaction
(vii) Y – 1e– ⟶ Y1+Oxidation Reaction
(viii) Z3+ + 1e– ⟶ Z2+Reduction Reaction

 

(i) Zn ⟶ Zn2+Oxidation Reaction
(ii) S ⟶ S2-Reduction Reaction
(iii) Sn2+ ⟶ SnReduction Reaction
(iv) Fe2+ ⟶ Fe3+Oxidation Reaction

 

💡 Some Related Questions

Chemical Bonding

Fill in the blanks with the correct word from the brackets:
(i) The bond between two elements in group 17[VIIA] of the periodic table is likely to be ____ [ionic/covalent].
(ii) In the reaction of Cl2 + 2KI ⟶ 2KCl + I2 the conversion of 2I to I2 is deemed as ____ [oxidation/reduction].
(iii) The covalent molecule containing three single covalent bonds is ____ [water/methane/ammonia].
(iv) The molecule of water combines with a ____ [hydrogen atom/proton/hydrogen molecule] to form a hydronium ion.
(v) For formation of an electrovalent bond between elements ‘X’ and ‘Y’ which are a metal and non-metal respectively, X should have a ____ [high/low] ionization potential and ‘Y’ a ____ [high/low] electron affinity.

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