A sample of a white powder is given to you to identify. You can use the Benedict test, the Lugol test, the Biuret test, and the Sudan Red test to identify it. If the white powder was an starch, how would each of the tests turn out

Benedicts test is used for testing reducing sugar in urine and food samples. Biuret test is used for testing proteins in a sample. Sudar Red test is used to detect lipids in a sample. For starch The Lugol test is carried out. when Lugols iodine is added to sample to the powder it will turn deep bluish black color showing the sample contain starch. The other tests will not give positive results with starch powder.