Acetylene

(as-etf -il-en) [acetu?n, vinegar], C2H2. A colorle gas, with a characteristic, unpleasant odor, burning with a luminous, smoky flame. It is formed by the imperfect combustion of illuminating gas and other The acetylene series of hyhydrocarbons. drocarbons has the general formula, CnH2I1_2. 25