Question

The one which has least iodine value is:
a.) Sunflower oil
b.) Ginger oil
c.) Ghee
d.) Groundnut oil

Answer 1

Hint: “In analytical chemistry Iodine value or Iodine Number, measure the degree of unsaturation of an oil, fat, or wax the amount of iodine, in grams, that is taken up by 100 grams of the oil, fat, or wax”.

Complete step by step answer:
Greater the degree of unsaturation means greater the iodine value.
Coming to options, Option A, sunflower oil has greater number of unsaturation so the iodine value of sunflower oil is high. So, option A is wrong.
Coming to option B, ginger oil has unsaturation but compared to sunflower oil the unsaturation is low in ginger iol.
Coming to option D, Groundnut oil. Ground oil is also highly unsaturated. So, the iodine value is higher for groundnut oil.
Now, coming to option C, Ghee. Ghee has the latest iodine value as it is saturated whereas the other compounds contain some degree of unsaturation.
So, the correct answer is “Option C”.

Note: Don’t be confused with the words degree of unsaturation and iodine number.
If the degree of unsaturation is high in compounds then iodine value is high. Means degree of unsaturation is directly proportional to iodine number.
Saturated compounds means those compounds free from double bonds have low iodine value when compared to unsaturated compounds that have double bonds.