Which of the following molecules contains least energy hint

Which of the following molecules contains least energy?

(hint: which bond has highest energy? Which molecule has the lead number of those bonds?)

A. Carbohydrate B. Saturated fatty acid

C. Unsaturated fatty acid D. Hydrocarbon

E. All contain the same amount of energy

Solution

Option A
The fatty acids are the highly reduced hydrocarbon derivatives that produces huge amount of energy under controlled rapid oxidation. Carbohydrates have higher oxidation states as compared to fatty acids and therefore produce lesser amount of energy.