What happens if we put blue litmus or red litmus on alcohol.Though alcohol is acidic it does not show any change in litmus solution? What about ketones and aldehydes? At home I have not this materials to see for myself at the time. About primary amines I found something interesting. I took a test tube, poured some solution of amine in it. The amine was dark red in colour. As I had little amount of solution I poured some distilled water and it was like amine was not soluble in it and when poured blue litmus solution 2-3 drops, the solution turned blue and when poured red litmus solution no change. Why , isn't amine basic?