National Chemistry Topic 7 - Hydrocarbons
Homework 1
1. Name one use for the alkanes mentioned below.
a. methane
b. butane
(2)
2. Copy and complete the following sentence:
The alkanes make up the simplest sub-set of all the _____________ and they all
contain ___________ bonds.
(2)
3. Copy and complete the table below, remembering to make the boxes big enough
to fit in all the full structural formula.
Alkane
Molecular Formula
Full Structural
Formula
Shortened
Structural Formula
propane
CH4
CH3CH2CH2CH2CH3
(6)
National Chemistry Topic 7 - Hydrocarbons
Homework 2
1.
What is meant by a homologous series?
(1)
2.
a. Write out the word equation for propane reacting with oxygen.
(1)
b. State the chemical test for each of the two products produced in this
reaction.
(2)
3.
Copy and complete the table below, remembering to make the boxes big
enough to fit in all the full structural formula.
Alkene
Molecular Formula
Full Structural
Formula
Shortened
Structural
Formula
butene
C2H4
CH3CH2CH3
(6)
National Chemistry Topic 7 - Hydrocarbons
Homework 3
1. Copy and complete the table below, remembering to make the boxes big
enough to fit in all the full structural formula.
Hydrocarbon
Possible Reactant
ethene
H2
ethane
H2
ethene
Br2
ethane
Br2
Full Structural Formula of
Product Formed
(if no product is formed then
simply write the word ‘none’)
(3)
Homework 3
2. When the hydrocarbons in question 1 do react, what is the name given to
this type of reaction?
(1)
3. Amy and Martin were given two bottles by their science teacher, one
containing hexane and the other containing hexene.
Describe an experiment Amy and Martin could carry out in order to discover
which bottle contained hexane and which contained hexene.
(2)
4. State the general formula for:
a. The alkanes
b. The alkenes
c. The cycloalkanes
(1)
5. Copy and complete the table below, remembering to make the boxes big
enough to fit in all the full structural formula.
Hydrocarbon
Full Structural Formula
butane
butene
cyclobutane
(3)
National Chemistry Topic 7 - Hydrocarbons
Homework 4
1. Copy and complete the following sentence:
Isomers are compounds with the same __________ ___________
different __________ ______________.
but a
(1)
2. The full structural formula of pentane is shown below:
a. Draw two isomers of pentane.
(2)
b. Name both these isomers.
(2)
3. In each of the following lists of hydrocarbons write down the one which is in
a different homologous series from the others.
(i) ethane, pentane, cyclopentane
(ii) CH4, C2H4, C10H20
(2)
Homework 4
4. Three different hydrocarbons were treated with bromine solution. Each of
the hydrocarbons contained six carbon atoms. The results are shown in the
table below:
Hydrocarbon
Formula
Effect on
Bromine Solution
(Water)
A
C6H12
Decolourises
quickly
B
C6H14
Does not
decolourise
C
C6H12
Does not
decolourise
For A, B and C:
a. give the names
b. draw possible structures
c. state whether they are saturated or unsaturated
(3)