By which process, the fatty acids change into Acetyl CoA?

Due to which process, there is a change in smell and taste of food items which contain fat and oils?

What is a fatty acid?

Saturated fatty acids have doubled bonds:

Name the essential fatty acids. Why are they so called?

A black compound of manganese reacts with a halogen acid to give greenish yellow gas. When excess of this gas reacts with NH_3 an unstable trihalide is formed. In this process the oxidation state of nitrogen changes from _________ .

When a candle burns, both physical and chemical changes take place. Identify these changes. Give another example of a familiar process in which both the chemical and physical changes take place.