Question

When a leaf of fresh sage or mint is rubbed ,the fragrance is

immediately obvious. Write a theoretical explanation for this observation

Answer 1

When fresh sage or mint leaves are rubbed, the fragrance is immediately obvious due to the presence of a carbonyl compound called cis-3-hexenal.

Step-by-step explanation:

The fragrance of fresh sage or mint leaves is immediately obvious when they are rubbed because of the presence of a carbonyl compound called cis-3-hexenal. This compound, along with related compounds, gives green leaves their characteristic odor. It is also used in products like shampoos to impart a herbal fragrance.

Answer 2

Answer: Volatile compounds present in the fresh sage leaf or mint leaf evaporate on rubbing.

Step-by-step explanation:

When fresh sage or mint is rubbed on the skin or any other surface the volatile chemicals associated with the integral structure of the plant part get evaporated in the surrounding air and the vapors can be detected by the olfactory receptors present in the nose. These receptors take the smell or fragrance stimulus and generate impulses or signals which goes to brain and brain interprets the smell or fragrance.