alkenes, hydrogenation and addition reactions

alkenes

homologous series of unsaturated hydrocarbons

alkene general formula

C(n)H(2n)

an alkene and a halogen produce…

halo alkane

in an addition reaction an 1.___ is reacted with a 2.____. 1 of the 3.___ bond breaks and becomes 4.___. the halogen then has open bonds that it can attach to within the alkene

1. alkene

2. halogen

3. double

4. single

if it goes colourless when halogen is added it…

initially had a double bond

hydrogenation is where an 1.___ becomes an 2.___ by adding 3.___

1. alkene

2. alkane

3. hydrogen

in hydrogenation, the alkene starts of 1.___ and ends up 2.___

1. unsaturated

2. saturated