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Burning magnesium continues to burn in n...

Burning magnesium continues to burn in nitric oxide, while burning sulphur is extinguised. Give reason.

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The reaction between magnesium and oxygen is highly exothermic, i.e. the heat evolved is enough to decompose `NO` into `N_2` and `O_2`, while the heat envolved during sulphur is not sufficient to decompose `NO`. Hence, buring `Mg` continues to burn in `NO`, but burning `S` is extinguished.
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