Objective Type Questions \( \mathrm{P} \) Which one of the followin...

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Objective Type Questions
\( \mathrm{P} \)
Which one of the following oxides produces brown
W air or reddish brown haze?
(1) Oxides of sulphur
(2) Oxides of nitrogen
(3) Oxides of carbon
(4) All of these
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