Unsaturated carbon compounds burn in oxygen with excessive black smoke providing a flame with . . . . . . . .
A. yellow
B. red
C. brown
D. blue
Answer: Option A
Related Questions on Organic Chemistry
Traditional 'battery' contains which of the following chemicals?
A. Ethylene glycol
B. Sulphuric acid
C. Sodium bicarbonate
D. Ethanol

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