Chemistry 7: Flashcards
1
Q
Do alkanes have carbon carbon double bonds
A
No
2
Q
What is the general formula for alkanes
A
CnH2n+2
3
Q
Do alkenes have double bonds
A
Yes
4
Q
What is the general formula for alkenes
A
CnH2n
5
Q
What is the trend as alkanes get bigger/chain gets longer
A
- More viscous
- Higher boiling point
- Less flammable
6
Q
What is cracking?
A
Long chain alkane is broken down into a smaller alkane and an alkene
7
Q
What are the two ways of cracking ?
A
Steam cracking
Catalyst
8
Q
What are some uses of alkenes
A
Plastics like polyethene, polystyrene
9
Q
How to test for alkenes
A
Orange bromine water - it will turn colourless in the presences of alkenes
