Preparation of Alkyne: From Ethyl Chloride: Ethylene , sodium chloride and water are produced by heating aqueous solution of sodium hydroxide with ethyl chloride. CH3-CH2Cl + NaOH -> CH2 = CH2 + NaCl + H2O From Ethanol: Ethanol and water are produced by heating extra concentrated sulfuric acid with ethanol. CH3-CH2-OH -> H2SO4-> CH2 = CH2 + H2O