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Assertion (A): $N O_{3}^{-}$ ion cannot be distinguish from $N O_{2}^{-}$ ion by brown ring test
Reason (R): Both $N O_{2}^{-}$ and $N O_{3}^{-}$ ions evolve brown $N O_{2}$ gas with conc. $H_{2} S O_{4}$ acid.

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A and R are true and R is explaining A

A is true and R is false

A is false and R is true

A and R are true but R is not explaining A

answer is D.

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Detailed Solution

$N O_{3}^{-}$ gives brown gas with $H_{2} S O_{4}$ .While $N O_{2}^{-}$ give SO₂ gas .

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