Select the correct statement

Ostwald's method of preparation of

H N O_{3}

is based upon catalytic oxidation of

N H_{3}

by atmospheric oxygen

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H N O_{2}

acts as both oxidising and reducing agents

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N O_{2}

reacts with

O_{3}

to form

N_{2} O_{5}

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All of these

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Solution

The correct option is D All of these
(A) $4 N H_{3} + 5 O_{2} P t / R h - ------ \to 5 a t m, 850^{\circ} C 4 N O (g) + 6 H_{2} O (g);$
Principal reaction of Ostwald's method of $H N O_{3}$ manufacturing.
(B) $H N O_{2}$ is weak oxidising agent and oxidises $F e^{2 +}$ to $F e^{3 +}$ , $I^{-}$ to $I_{2}$ and is self reduced to $N_{2} O$ or $N O$ . In contrary, $H N O_{2}$ is oxidised by $K M n O_{4}$ and $C l_{2}$ forming $N O_{3}^{-}$ .
(C) $2 N O_{2} + O_{3} ⟶ N_{2} O_{5} + O_{2}$

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