Alkanes and Alkenes

Question 1

what are alkanes

Answer 1

part of a homologous series
saturated

Question 2

homologous series

Answer 2

same functional group
gradation in physical properties
same general formula CnH2n+2

Question 3

isomers

Answer 3

same molecular formula but different structural and displayed formula

Question 4

substitution reactions

Answer 4

alkanes react with halogens under the presence of UV light
eg bromine + ethane = _bromoethane + HBr

Question 5

Saturated vs Unsaturated

Answer 5

saturated means there are only single bonds between carbons in a hydrocarbon

Question 6

distinguishing saturated and unsaturated compounds

Answer 6

test: bromine water
when liquid alkene shaken with bromine water it decolourises the mixture
does not change with an alkane

Question 7

alkenes

Answer 7

1 carbon carbon double bond
CnH2n
name can change with position of double bond

Question 8

addition reaction

Answer 8

2 halogen atoms added to to alkene without removal of other atoms