Statement-I: ${NO}_{3}^{-}$ and ${NO}_{2}^{-}$ both do not give brown fumes with dil $H_{2} {SO}_{4}$ .
Statement-2: Protonation of ${NO}_{2}^{-}$ is more easier compared to ${NO}_{3}^{-}$ Since ${NO}_{3}^{-}$ is more stable by resonance.

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Statement-1 is False, Statement-2 is True.

Statement-1 is True, Statement-2 is True; Statement-2 is a correct explanation for Statement-1.

Statement-1 is True, Statement-2 is True, Statement-2 is NOT a correct explanation for Statement-1.

Statement-1 is True, Statement-2 is False

answer is A.

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Detailed Solution

Statement-1 is True, Statement-2 is True; Statement-2 is a correct explanation for Statement-1.

${NO}_{3}^{-}$ and ${NO}_{2}^{-}$ do not produce brown fumes when combined with dilute $H_{2} {SO}_{4}$ because ${NO}_{2}^{-}$ is easier to protonate than ${NO}_{3}^{-}$ which is more stable by resonance.

Hence, option A is correct.

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