Question

When performing a scientific investigation on an unknown substance. How can an indicator help you determine if the substance is a starch? Would it be the indicator will change the taste of the substance or the indicator will change the smell of the substance or the indicator will change the color of the substance or last would it be the indicator will change the state of the sub

Answer 1

To determine if a substance is starch, an indicator known as iodine can be used. When iodine is added to starch, it reacts and produces a characteristic color change. Specifically, the iodine forms a blue-black complex with the starch molecules.

Among the options you provided, the correct one would be:

• The indicator will change the color of the substance.

The taste, smell, or state change of the substance are not reliable indicators for identifying starch in this method.