Question

A scientist adds iodine as an indicator to an unknown substance what will this indicator reveal about the substance A The presence of starch B The presence of baking powder C The presence of a lipids of fat D The presence of glucose

Answer 1

When iodine is added as an indicator to a substance, it specifically reveals the presence of starch. Therefore, the correct answer is:

**A The presence of starch.**

Iodine turns a blue-black color in the presence of starch, while it does not change color when mixed with baking powder, lipids, or glucose.