Naphthalene burns with a yellow sooty flame. This is because
- A.carbon to hydrogen ratio is low
- B.there is incomplete combustion
- C.there is excess supply of air
- D.of presence of impurities of nitrogen and sulfur
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Naphthalene is an aromatic hydrocarbon, C10H8, with a very high proportion of carbon, so the air around the flame cannot supply enough oxygen to burn all of it to carbon dioxide.
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