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Introduction to Oxidation and Reduction

NO2- interfer...

Question

${N O_{2}}^{-}$ interferes in the 'ring test' of $N O_{3}^{-}$ . It is removed from the mixture using urea.
If true enter 1, else enter 0

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Solution

If $N H_{4} C l$ or urea is added to a solution containing ${N O_{2}}^{-}$ and ${N O_{3}}^{-}$ , ${N O_{2}}^{-}$ is decomposed as $N O_{2}$ and thus, removed.
$N a N O_{2} + N H_{2} C l ⟶ N a C I + N_{2} + 2 H_{2} O$
$2 N a N O_{2} + N H_{2} C O N H_{2} ⟶ 2 N_{2} + N a_{2} C O_{3} + 2 H_{2} O$
Hence, the correct answer is $1$ .

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