Question

state which of the following are oxidation and which are reduction reaction.
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Answer 1

Oxidation reactions: (3) Sn4+ + 2e– → Sn2+ (6) X + 2e– → X2- (7) Y - Ie– → Y1+ (8) Z3+ + Ie– → Z2+ Reduction reactions. (1) Cu → Cu2+ + 2e– (2) Cu2+ + 2e– → Cu (4) 2Cl- → Cl2 + 2e- (5) Fe2+ → Fe3+ + Ie

Answer 2

Answer:

OXIDATION

[ a ] 1,4,5,7 , other reduction

[ b ] 1,4 , other reduction

Explanation:

when oxidation state increases, oxidation occurs and when it decreases, reduction occurs

for example, 1st part

reactant Cu has O.S. = 0

but product Cu2+ has O.S. = +2

on going left to right in chemical equation O.S. increases, hence the process is oxidation

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