Fragrances

Question 1

What are essential oils?

Answer 1

Concentrated extracts of volatile, non-water soluble aroma compounds from plants.
They’re a mixture of many different compounds

Question 2

What are essential oils defined by?

Answer 2

The fact they convey characteristic fragrances

Question 3

What are essential oils used in?

Answer 3

Perfumes, cosmetic and cleaning products and flavourings in foods

Question 4

What is a key component found in most essential oils?

Answer 4

Terpenes

Question 5

Are terpenes saturated or unsaturated?

Answer 5

Unsaturated(contain double bonds)

Question 6

How are terpenes formed?

Answer 6

By joining together isoprene units

Question 7

What is the chemical formula for isoprenes?
What’s is the molecular formula of an isoprene?

Answer 7

2-methylbuta-1,3-diene
C5H8

Question 8

How do you work out the number of isoprene units in a terpene?

Answer 8

One isoprene units had 5 carbon atoms so add up the number of carbon atoms and divide by 5

Question 9

What are terpenes components in a wide variety of?

Answer 9

Fruit and floral flavours and aromas

Question 10

What do terpenes produce when oxidised within plants?

Answer 10

Some of the compounds responsible for the distinctive aroma of spices