Aromatherapy Essential Oil Chemistry 2

Question 1

Which chemical family is primarily responsible for the fresh, citrusy aroma in oils like lemon and orange?

Accepted Answer

Monoterpenes

Answer

Monoterpenes such as limonene dominate citrus oils and give them their fresh, light aroma.

Question 2

The compound eugenol, known for its numbing and antiseptic action, belongs to which chemical group?

Accepted Answer

Phenols

Answer

Eugenol is a phenol found in clove oil, giving it strong antiseptic and warming properties.

Question 3

Which functional group is most associated with the calming, relaxing esters found in lavender oil?

Accepted Answer

Linalyl acetate

Answer

Linalyl acetate is an ester that contributes to lavender's soothing, sedative character.

Question 4

Oxides such as 1,8-cineole are best known for which therapeutic effect?

Accepted Answer

Expectorant and respiratory support

Answer

1,8-cineole (eucalyptol) is a respiratory expectorant common in eucalyptus and rosemary.

Question 5

Which class of oxygenated compounds can be neurotoxic in high doses, requiring caution with oils like pennyroyal?

Accepted Answer

Ketones

Answer

Ketones such as pulegone can be neurotoxic and hepatotoxic if overused.

Aromatherapy Practice Test