Question

Double bond present in fatty acid molecule is quantified by

• A. Saponification number
• B. Iodine number
• C. Acid number
• D. Polensky number

Answer 1

The correct option is B Iodine number

Iodine number is a measure of the unsaturation of a substance (oil or fat) expressed as the number of grams of iodine or equivalent halogen absorbed by 100 grams of the substance. Saturated oils, fats, and waxes do not take up iodine.Therefore their iodine value is zero. But unsaturated oils, fats, and waxes take up iodine. The more the iodine attached, the higher is the iodine value, the more reactive, less stable and more susceptible to oxidation and rancidification is the fat.

So, the correct answer is 'Iodine number'