Download St Andrew`s and St Brides High Nature`s Chemistry Alkenes

St Andrew’s and St Brides High
Nature’s Chemistry
Alkenes Homework
1.
The key below shows the name and general formula of some families of hydrocarbons.
(a) (i) Butyne is an alkyne with 4 carbon atoms.
Using the key, write the molecular formula for butyne.
(ii) Hydrocarbon X is a ring compound with molecular formula C6H6.
Using the key, name the family to which it belongs.
2.
In industry, alcohols can be produced from alkenes as shown in the example below.
Name the type of chemical reaction taking place.
3.
Bromine reacts with the molecule below to produce a saturated compound.
Saturated molecule
Draw the structural formula for this saturated compound.
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St Andrew’s and St Brides High
Nature’s Chemistry
Alkenes Homework
4.
Ethylthioethane can also be formed by the reaction of ethylthiol with ethene.
Suggest a name for the type of chemical reaction taking place.
5.
The alkynes are a family of hydrocarbons which contain a carbon to carbon triple bond.
(a)
Suggest a general formula for the alkynes.
(b)
Alkynes are prepared by reacting a dibromoalkane with sodium hydroxide.
(i)
(ii)
Draw-the structural formula for the alkyne formed when the dibromoalkane
shown below reacts with sodium hydroxide.
Suggest why the dibromoalkane shown below does not form an alkyne when
heated with sodium hydroxide.
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