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Q.

In the brown ring test for nitrates, Fe2+ reduces nitrates to nitric oxide in acid medium (dil. H2SO4),the change in oxidation state of nitrogen will be

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a

+3 to +2

b

+5 to +2

c

+5 to +1

d

+3 to +1

answer is A.

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Detailed Solution

O.S. of N in NO3- is +5 and in NO the O.S. of N is +2

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