Answer:there is visible blue black coloration
Explanation:starch is a polysaccharide,it is composed of only glucose combined by glycosidic bonds.starch is majorly an insoluble carbonhydrate.
Starch consist of two distinguishable polysaccharide fraction namely amylose and amylopectin.
The iodine test is used to check for the presence of starch.
It gives a blue black coloration for amylose which is present in potato.
But in amylopectin,it gives a reddish coloration.