Question

why is water tested also when testing for carbohydrates?
it is the experimental group since water contains carbohydrates.
it is the control group since water doesnt contain carbohydrates.
you always test water when doing an experiment.

Explanation:

Water is tested as a control in carbohydrate - testing experiments. It serves as a baseline to compare results. Since water does not contain carbohydrates, any positive result from other samples can be accurately identified against this negative control.

Answer:

It is the control group since water doesn't contain carbohydrates.