physical properties:
odour:
colour:
aspect:
reaction with litmus paper:
chemical properties:
biuret's test
no violet colour
the solution is not protein
molish's test
violet ring spread by shaking
general test for carbohydrate.the solution react with sulphuric acid will form furfural,and then react with alpha napthol will form violet ring.
iodine's test
reddish colour and ppt
absorption of iodine on the surface of the solution molecule
confirmatory test
fehling's test
slight reddish colour and ppt
little amount of rducing sugar in this solution
conclusion:
the solution is dextrin
