Question

Air holes of a gas burner have to be adjusted when the heated vessel get blackened by the flame give reason

Answer 1

because when the flame high the there is a chance to break the vessel

Answer 2

Hello there !!

The blackening of the vessels indicate sooty flame due to incomplete combustion of the fuel .

Air (oxygen )is necessary for complete combustion. The air holes of the gas burner provide air for combustion and they have to be adjusted so that a blue and non-sooty flame is produced.

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