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Question
A compound on strongly heating evolves a reddish brown gas in the presence of which a burning splint reignites. The gas evolved may be:
Options
NO2 only
NO2 and CO2
O2 only
NO2 and O2
MCQ
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Solution
NO2 and O2
Explanation:
The thermal decomposition of heavy metal nitrates (like lead nitrate) releases a mixture of reddish-brown nitrogen dioxide (NO2) gas and oxygen (O2), where the oxygen causes the splint to reignite.
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