2.5- hydrocarbons

Question 1

What can an electrophilic addition reaction be used to produce?

Answer 1

-unsaturated oils can be made saturated.
-hardens the oil to make edible fate such as butter

Question 2

Define polymerisation

Answer 2

The joining of monomers to form a large polymer chain

Question 3

electrophillic addition

Answer 3

An alkene is converted into a halogenoalkane.

Question 4

What type of polymerisation do alkanes and alkenes undergo ?

Answer 4

ADDITION POLYMERISATION

Question 5

test for alkenes x2

Answer 5

bromine water - brown to colourless
purple potassium manganate- purple to colourless

Question 6

How does the major product of an addition reaction occur ?

Answer 6

the halogen will bond to the Carbon surrounded by the most alkyl groups.
More stable due to a delocalised positive charge spread from the surrounding groups.

Question 7

Describe the bonding in an alkene

Answer 7

sigma bonds - s and p overlap
pi bonds - sideways p-p overlap

Question 8

What is the pi bond ?

Answer 8

• A sideways overlap of the p orbitals.