Alkanes And Alkenes

Question 1

What are alkanes

Answer 1

Hydrocarbons with no double bond. It is a saturated hydro carbon

Question 2

What is an alkene

Answer 2

A hydro carbon with a double bond between two of the carbon atoms, they are in saturated. Methane can’t be a alkene as it only has one carbon atom

Question 3

Test for seeing if a hydro carbon is an alkane or alkene

Answer 3

Bromine water is used and a solution with the hydro carbon is added. If it’s an alkane there is no colour change if it’s an alkene there the liquid become colourless

Question 4

How is cracking done

Answer 4

Long hydro carbons are heated and thermally decomposed. This breaks it into s shorter hydro carbon and alkene a

Question 5

What is a polymer

Answer 5

A molecule made up of thousands of of monomers such as ethene which react together to form polymers

Question 6

What is polyethene used for

Answer 6

Aka polythene. Used for making plastics

Question 7

Different polymer uses

Answer 7

Polyethene used for plastic bags, wire insulation and cling film. Cheap and flexible
Polypropene used for buckets and Bowles. Flexible and shatterproof with high softening point
Polychloroethene used for making PVC
Polytetrafluoroethene used for non stick coatings. Tough, slippery resistant to corrosion and good insulator