What does a blue, non-luminous flame indicate when a hydrocarbon is burnt?

Question

What does a blue, non-luminous flame indicate when a hydrocarbon is burnt? — Exam MCQ

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C. Complete combustion with high temperature — A blue, non-luminous flame seen when a hydrocarbon is burnt indicates complete combustion with high temperature.

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A. Presence of unburnt carbon

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B. Lack of oxygen

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D. Incomplete combustion and soot formation

What does a blue, non-luminous flame indicate when a hydrocarbon is burnt?

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