Question

a scientist adds iodine as an indicator to an unknown substance. what will this indicator reveal about the substance? (1 point)
the presence of lipids or fat
the presence of starch
the presence of glucose
the presence of baking powder

Explanation:

Iodine is a well - known chemical indicator. When iodine comes into contact with starch, it forms a complex. This complex has a characteristic blue - black color. For lipids or fats, other tests like the Sudan stain are used. Glucose is typically tested using Benedict's solution. Baking powder is a mixture, and iodine does not specifically react with it in a way that is relevant to its common testing methods.

Answer:

the presence of starch