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

Responses

The substance is not glucose based.
The substance is not glucose based.

The substance is glucose based.
The substance is glucose based.

The test was inconclusive because the student forgot to add heat.
The test was inconclusive because the student forgot to add heat.

The test was inconclusive because the student needed to also test with iodine or vinegar.

Answer 1

The correct conclusion the student can make is:

The test was inconclusive because the student forgot to add heat.

Benedict's test requires heating to facilitate the reaction between the reagent and reducing sugars (like glucose). If there is no color change, it could be because the test was not properly conducted, rather than indicating that the substance is not glucose based.