Alkanes

Question 1

How are fuels obtained from crude oil , why and how does it work ?

Answer 1

Fractional distillation
Works due to the different fractions having different boiling point

Question 2

What is the process of Cracking ?

Answer 2

Conversion of long chain alkanes
Into useful smaller chain alkenes

Question 3

Why might longer chains of alkanes have a higher boiling point than shorter chains ?

Answer 3

Boiling point increases with increasing mr
More intermolecular forces

Question 4

Define ‘ Fractional Distillation ‘

Answer 4

Separation by different boiling points

Question 5

Define ‘ Homologous Series ‘

Answer 5

Compounds with the same functional groups
Differing by CH2
Same general formula

Question 6

What are the features of an aliphatic compound ?

Answer 6

No benzene ring, any structure (Linear or circular)

Question 7

What are the features of an alicyclic compound ?

Answer 7

Cyclic compound, no benzene ring

Question 8

What are the features of an aromatic compound ?

Answer 8

Cyclic compound
Benzene ring

Question 9

What is the general formula of the alkyl groups

Answer 9

Cn H2n+1