Question

what reagent is used to test for starch?
benedicts
biurets
lugels iodine
sudan iv

Explanation:

Benedict's reagent is used to test for reducing sugars. Biuret's reagent is for proteins. Sudan IV is for lipids. Lugol's iodine (iodine - potassium iodide solution) forms a blue - black complex with starch due to the interaction between iodine and the helical structure of amylose in starch.

Answer:

C. Lugel's iodine