FRAGRANCES

Question 1

Describe essential oils?

Answer 1

• very volatile liquid,
• low bp,
• insoluble in water,
• oil extracted from plants used in perfumes, costemetics, candles, food flavourings

Question 2

what is a key component of essential oils

Answer 2

Terpenes

Question 3

what is a terpene?

Answer 3

an unsaturated hydrocarbon formed by joining units of isoprene

Question 4

What is the systematic name of an isoprene unit?

Answer 4

2-methylbuta-1,3-diene

Question 5

Draw an isoprene unit

Answer 5

2-methylbuta-1,3-diene

Question 6

A terpene has the molecular formula: C₄₀H₆₄

How many isoprene unit is this terpene made of?

Answer 6

8 isoprene units

(40/5 = 8)

Question 7

What is the chemical technique used to extract essential oil ?

Answer 7

Distillation

Question 8

What is the name of the piece of equipment used in distillation to cool down the vapor of essential oil ?

Answer 8

A condensor,

it condense the vapour essential oil into liquid.