Part 2: (a) Alkanes, Alkenes, Cycloalkanes and Reactions
1. Name the alkanes that contain
(a) 1 carbon atom and (b) 4 carbon atoms.
2 .
(a) Write the general formula for the alkanes.
(b) Give the molecular formula for each of the following (i) butane
(ii)methane (iii) octane
(c) Draw the full structural formula for the above compounds.
3. Write the shortened structural formula for (a) C2H6 (b) C4H10
4. Write the general formula for the cycloalkanes.
5. Draw the (i) full structural formula (ii) molecular formula for
(a) cyclopropane
(b) cyclopentane
6. Write the general formula for the alkenes.
7. Name the alkene with the number of C atoms stated (a) 3 (b) 5 (c) 6
8. Draw the (i) full structural formula (ii) molecular formula for
(a) Propene
(b) butene
9. Write the molecular formula for
(a) the sixth member of the alkane series.
(b) The cycloalkane with 5 carbon atoms.
(c) The fourth member of the alkene series
(d) An alkene with a total of 27atoms.
10.
(a) Explain the meaning of the term “isomer”.
(b) Draw two isomers of C4H10
(c) Draw two isomers of C3H6 , one of which is saturated and the other unsaturated.
(d) Explain the meaning of the term “saturated” and “unsaturated.”
11. C4H8 could be two different types of hydrocarbon. Name the homologous series of hydrocarbons they could belong to and draw two possible structures
12. One of the first anaesthetics to be used was chloroform (CHCl3). The table below shows the anaesthetic effect of methane and some chlorine compounds (like chloroform) which was based on methane.
(a) Using the information in the table, what general statement can be made about the compounds and their anaesthetic effect?
(b) Methane can be made to react with chlorine gas to give chloroform and hydrogen chloride. Use symbols and formulae to write an equation for this reaction.
13. Class 3H, were studying hydrocarbons. Here are some statements from the pupils’ notes.
(a) which statement can be applied to both butane and cyclobutane? (2 boxes)
(b) which statement can be applied to propane but not to butane (1 box)
14. Draw the extended structural formula for
(a) Propene (b) cyclopropane
(c) butane (d) ethene
15. Write the names for
(a) CH3CH2CH= CH CH2 CH3 (b) CH3 CH2 CH2 CH= CH2
16. Write the molecular formula for the following hydrocarbons.
17. Each box in the grid below shows the name or the formula of a compound
Identify the box(es) which show
(a) an alkene (2 boxes) (b) an alkane ( 2 boxes) (c) an isomer of box E
18.
(a) Identify the hydrocarbon which reacts with hydrogen to form butane.
(b) Identify the 2 isomers.
(c) Identify the hydrocarbon(s) which is (are) the first member(s) of a homologous series.
19.
(a) Identify the 2 hydrocarbons which would quickly decolourise bromine solution.
(b) Identify the isomer of the hydrocarbon in box D which belongs to a different homologous series.
