Swara placed two drops of iodine solution on a cut slice of raw potato and observed a dark blue-black colour…
Swara placed two drops of iodine solution on a cut slice of raw potato and observed a dark blue-black colour. However, when she tested pure mustard oil with iodine solution, no blue-black colour appeared. What can she infer from this observation?
Potato contains starch, whereas mustard oil does not contain starch
Mustard oil neutralizes the iodine solution instantly
Potato contains simple sugars that react specifically with iodine
Solution
Iodine solution gives a characteristic dark blue-black colour only when it reacts with starch. Potatoes are rich in starch, while mustard oil consists of fats.