A student is performing a Benedict’s test on an unknown substance. The student adds the reagent (the chemical required to make a color change), and nothing happens. Which conclusion can the student make?(1 point)

Question

A student is performing a Benedict’s test on an unknown substance. The student adds the reagent (the chemical required to make a color change), and nothing happens. Which conclusion can the student make?(1 point) 
The substance is glucose based. 
The substance is not glucose based.
The test was inconclusive because the student needed to also test with iodine or vinegar. 
The test was inconclusive because the student forgot to add heat.

GPT-4o mini · Answer

The correct conclusion the student can make is: The substance is not glucose based.

The Benedict's test is specifically designed to detect reducing sugars such as glucose, and a lack of color change indicates that the substance does not contain reducing sugars. The other suggestions do not apply in this context.