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Nitrous Oxide

A colourless ...

Question

A colourless gas ' $x$ ' forms a brown coloured gas ' $y$ ' when mixed with air. $x$ and $y$ could be :

A

N O, N O_{2}

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B

N O, O_{2}

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C

N O_{2}, N_{2} O_{4}

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D

N O, N_{2} O_{4}

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Solution

The correct option is A $N O, N O_{2}$
Nitric oxide is a colorless, flammable gas with a slight odor. Nitrogen dioxide is a deep red-orange gas that is poisonous but not flammable. When $N O$ comes in contact with air it oxidizes and following reaction takes place.
$2 N O + O_{2} ⟶ 2 N O_{2}$
Hence, 'x' is $N O$ and 'y' is ${N O}_{2}$ .

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