A student is preforming the Benedict's test on an unknown substance.the student adds a reagent(the chemical required to make the color change)And nothing happens.Which conclusion can the student make?

Question

A.The substance is glucose based
B.The test was inconclusive because the student forgot to add heat
C.The inconclusive because the student needed to also test with iodine or vingar
D.The substance is not glucose based

Answer 1

The correct conclusion the student can make is:

D. The substance is not glucose based.

Benedict's test is specifically used to detect reducing sugars, such as glucose. If the reagent is added and there is no color change, it indicates that there are no reducing sugars present in the sample being tested. While it's possible that the test was performed incorrectly (for example, without heat), the question indicates that nothing happened, which strongly suggests the absence of glucose or similar reducing sugars.