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Nitrogen dioxide when dissolved in water it produce an acid and a gaseous substance. Same gaseous substance is also produced in the reaction

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${({NH}_{4})}_{2} {Cr}_{2} O_{7} \overset{∆}{\to}$

${NH}_{4} Cl (aq) + {NaNO}_{2} (aq) \overset{∆}{\to}$

${AgNO}_{3 (aq)} + {FeSO}_{4 (aq)} \overset{H^{+}}{\to}$

${({NH}_{4})}_{2} {SO}_{4} + {NaOH}_{(aq)} \overset{∆}{\to}$

answer is C.

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Detailed Solution

$\begin{array}{l} 3 {NO}_{2} + H_{2} O \to 2 {HNO}_{3} + NO \\ {NO}_{3}^{-} + 3 {Fe}^{2 +} + 4 H^{+} \to NO + 3 {Fe}^{3 +} + 2 H_{2} O \end{array}$

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