U2-2-1 - Alcohols

Question 1

Name this functional group

Answer 1

Hydroxyl

Question 2

All alcohol names end in … .

Answer 2

–ol

(e.g. ethanol)

Question 3

What is missing from the name?

Butanol

Answer 3

Location of OH group

(butan-2-ol)

Question 4

Which side do we number the carbon chain from (left or right)?

Answer 4

Right - must give lowest possible number to OH group (3-methylbutan-1-ol).

Functional groups take priority over alkyl groups (so C=C or OH over CH₃ or C₂H₅)

Question 5

General formula for alkanols

Answer 5

C_nH_2n+1OH

Question 6

How are alcohols made in industry?

Answer 6

Via hydration of alkenes

Question 7

Name this type of reaction

Answer 7

Dehydration

Question 8

How many carbons in the longest chain?

Answer 8

5

You can’t have branches at the start/end of the chain!