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

The substance is glucose based.

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 the mixture in order to produce a color change if reducing sugars like glucose are present. If no heat was applied, the test may not show a color change, leading to inconclusive results regarding the substance's composition.