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Q.

brown ring is formed in the ring test for ${NO}_{3}^{Θ}$ ion. It is due to the formation of

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a

FeSO₄.HNO₃

b

${[Fe {(H_{2} O)}_{4} (NO)_{2}]}^{2 +}$

c

${[Fe {(H_{2} O)}_{5} (NO)]}^{2 +}$

d

FeSO₄.NO₂

answer is A.

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Detailed Solution

brown ring is hydrated nitroso ferrous sulphate

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