ICSE Class 10 Chemistry 2022 Solved Paper

State the observation for the following :

Question : 25 of 55

Marks: +1, -0

Dry ammonia gas reacts with oxygen in the presence of a catalyst.

Solution:

Reddish brown vapours of nitrogen dioxide

( {\NO}_2)

are seen in the flask due to the oxidation of nitric oxide (NO).

\;4 {\NH}_3+5 {\O}_2 {─────▸}↖{ {\Pt}, 800^{∘} {\C}} 6 {\H}_2 {\O}

+4 {\NO} ↑+∆

\;2 {\NO}+ {\O}_2 → 2 {\NO}_2 \;\text " (brown gas) "\;

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