Q.

Match Column I with Column II related to the figure given below and then select the appropriate option from the codes given below.

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A - 2 ; B - 1 ; C - 3 ; D - 2

A - 2 ; B - 3 ; C - 1 ; D - 2

A - 1 ; B - 2 ; C - 1 ; D - 3

A - 1 ; B - 2 ; C - 3 ; D - 1

answer is A.

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Detailed Solution

Given figure represents the corrosion of iron in the atmosphere. Oxidation occurs at anode and reduction occurs at cathodeCathode = O2(g)+4H+(aq)+4e−−⟶2H2O(l); EH+O2H2O∘=1.23VAnode = 2Fe(s)⟶2Fe2+(aq)+4e−;EFe2+/Fe∘=−0.44VOverall reaction = 2Fe(s)+O2(g)+4H+(aq)⟶2Fe2+(aq) +2H2O(l);Ecell∘=1.67V

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