Question

Iodine solution was added to four samples of food 1,2,3,4 which will develop blue blac color? 1) boiled rice 2) crushed potatoes 3) boiled arhar dal 4) powdered arhar dal

Answer 1

1,2
starch solution turns iodine blue black

Answer 2

Iodine solution is added to the food samples of food potato will develop blue black colour.

Option 2

Explanation:

• iodine is originally brownish in colour. However when it is exposed to start iodine solution reacts with starts to form a blue black complex.

• Potato is rich in starch. When a few drops of iodine solution are added to crush potatoes the the iodine solution reacts with the start which is present in the potato to give a change in the colour

• however rice contains glucose Dal contains protein. as a result there is no change in colour in which food items

to know more about action of iodine on starch,

Why does iodine Turn blue-black in the presence of starch? Brainly.in

https://brainly.in/question/7167038