(a) Molisch’s test: 3 ml of the aqueous extract was added to 2 ml of
Molisch’s reagent and the resulting mixture shaken properly. 2 ml of
concentrated H2SO4 was then poured carefully down the side of the
test tube. A violet ring at the interphase indicates the presence of
carbohydrate.
(b) To 3 ml of the aqueous extract was added about 1 ml of iodine
solution. A purple colouration at the interphase indicates the
presence of carbohydrates.