Mar 26, 2009 · there are 4 alcohols of formula C4H9OH. what are their formulas. classify and name each alcohol? ... (secondary alcohol) ... (primary alcohol) t-butyl alcohol ... alcohol is very rapid, followed by the secondary alcohol that may take from 5 to 20 minutes to form visible cloudiness. Primary alcohols do not react with Lucas reagent or it may show very little result in a very long time. The chemical reaction involves replacing the –OH group of the alcohol with a chloride ion from Difference Between Isopropyl and Ethyl Alcohol Molecular Formula. Isopropyl has the molecular formula of CH 3 CHOHCH 3. Ethyl Alcohol has the molecular formula of CH 3 CH 2 OH. Category. Isopropyl is a secondary alcohol since -OH is attached to the 2 nd carbon. Ethyl Alcohol is a primary alcohol since -OH is attached to the 1 st carbon ... The present study reveals the combustion analysis specifically on cycle-to-cycle variations in spark ignition engines and performance characteristics of secondary butyl alcohol (sec- butanol) â€“ gasoline blends at 5%, 10% and 15% by volume of sec-butanol in gasoline fuels.