1. If propene is allowed to react with water in the presence of an acid as a catalyst, then propan - 2-ol is obtained.
2. If benzyl chloride is treated with NaOH (followed by acidification) then benzyl alcohol is produced.
3. When ethyl magnesium chloride is treated with methanal, an adduct is produced which gives propan-1-ol on hydrolysis.
4. When methyl magnesium bromide is treated with propane, an adduct is the product which give 2- methyl propane - 2-ol hydrolysis.