Question

which color change represents a positive reaction for the presence of starch using the iodine test? multiple choice color change from green to red color change from amber to blue/black color change from blue to brownish - red color change from yellow to green

Explanation:

Iodine solution is typically amber - colored. When it reacts with starch, a blue - black complex is formed due to the interaction between iodine and the helical structure of amylose in starch.

Answer:

color change from amber to blue/black