Alkenes

Question 1

Test for alkenes

Answer 1

Br² Bromine water: Orange/Brown to colourless

Question 2

How to form halogenoalkane

Answer 2

Electrophilic substitution
Double bond attacks X in X-X bond. X- leftover attack neighbouring carbocation.

Question 3

Polymerisation conditions

Answer 3

High pressure and temperatures produces branched chain polymers with weak IMF. Lower pressures and temperatures produce straight chain polymers with strong IMF

Question 4

Properties of polymers

Answer 4

Unreactive hydrocarbon chains with multiple strong, non-polar covalent bonds.

Question 5

E-isomers have:

Answer 5

The heavy chain on the opposite ends.

Question 6

Z-isomers have:

Answer 6

Heaviest chains on the same side

Question 7

Reaction with sulfuric acid

Answer 7

Electrophilic substitution
Room temperature

Question 8

PVC information:

Answer 8

Poly(Chloroethene) is an addition polymer with waterproof properties. It gains these properties by the addition of a plasticiser during the reaction.