NH_3 + O_2 xrightarrow[Delta]{Pt} A + H_2O;A | vedclass

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(B) The given reactions represent the steps of the Ostwald process for the manufacture of nitric acid:$1$. Catalytic oxidation of ammonia: $4NH_3 + 5O

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$NO, NO_2$ and $HNO_3$

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(B) The given reactions represent the steps of the Ostwald process for the manufacture of nitric acid:$1$. Catalytic oxidation of ammonia: $4NH_3 + 5O_2 \xrightarrow[\Delta]{Pt} 4NO + 6H_2O$. Thus,$A = NO$.$2$. Oxidation of nitric oxide: $2NO + O_2 	o 2NO_2$. Thus,$B = NO_2$.$3$. Absorption of nitrogen dioxide in water: $4NO_2 + O_2 + 2H_2O 	o 4HNO_3$. Thus,$C = HNO_3$.Therefore,$A, B$ and $C$ are $NO, NO_2$ and $HNO_3$ respectively.

$NH_3 + O_2 \xrightarrow[\Delta]{Pt} A + H_2O;$
$A + O_2 \to B$
$B + O_2 + H_2O \to C$
$A, B$ and $C$ are:

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$NH_3 + O_2 \xrightarrow[\Delta]{Pt} A + H_2O;$$A + O_2 \to B$$B + O_2 + H_2O \to C$$A, B$ and $C$ are: