ANATOMY

Detailed explanation-1: -Iodine is a common indicator to test for the presence of starch. The light orange-brown colour Iodine solution turns blue-black in colour when it reacts with starch. This indicates the presence of carbohydrates in the food item to which iodine solution was added.

Detailed explanation-2: -Using an iodine solution, you can test for the presence of starch. When starch is present, the iodine changes from brown to blue-black or purple.

Detailed explanation-3: -Iodine-KI Reagent: Iodine is not very soluble in water, therefore the iodine reagent is made by dissolving iodine in water in the presence of potassium iodide. This makes a linear triiodide ion complex with is soluble that slips into the coil of the starch causing an intense blue-black color.

Detailed explanation-4: -The correct option is B Rice is a rich source of starch and iodine gives blue black colour with starch.

Detailed explanation-5: -Iodine test is done to confirm the presence of starch in a given food sample. Conversion of the colour of iodine from brown to violet indicates the presence of starch. Q.