for the starch iodine test is performed in which the starch reacts with iodine to produce dark blue colour which confirms the presence of starch.
for glucose benedict's and fehling's test is performed.
benedict's test: 1 ml sample is mixed with 1 ml of benedicts solution and the heated upto boiling if the colur changes to brick red then it confirms the presence of glucose
fehling's test: similarly 1 ml fehling's solution I & fehling's solution II each in taken together and to it 1 ml of the sample is takenon then heated uptill boiling. if the colour changes to brick red the it confirms the presence of glucose.
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