Smoke in a flame is due to the presence of carbon content in the fuel.

True

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False

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Solution

The correct option is B False
Whenever there is some unburnt residue in the product gases, the particles diffuse light passing through them and we see it as smoke.

If oxygen supply is limited, it will result in unburnt suspended particles in product gases which do not get oxygen to react with. And when there are non-inflammable impurities, they too will not burn and will result in ash or suspended particles.

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