1.  The general formula for alkanes is...

C_nH_2n-2
C_nH_2n
C_nH_2n+2

C_nH_3n

2.  The empirical formula of cyclohexane is ...

C_nH_2n+2
CH₂
C₃H₇

C₆H₁₂

3.   Which of the following straight chain alkanes has the highest boiling point?

C₂H₆
C₃H₈
C₄H₁₀

C₅H₁₂

4.  Which of the following alkanes has the lowest boiling point?

CH₃CH₂CH₂CH₂CH₃
CH₃CH(CH₃)CH₂CH₃
CH₃CH₂CH₂CH₂CH₂CH₃

CH₃C(CH₃)₂CH₃

5.  What is the name of the compound with the structural formula, CH₃CH(CH₃)CH(CH₃)CH₂CH₃?

heptane
2,3-dimethylpentane
2,3-methylpentane
3,4-dimethylpentane

6.  The number of structural isomers with the molecular formula C₅H₁₂ is...

2
3
4

5

7.  The alkane which requires 5 moles of oxygen per mole for complete combustion is...

C₂H₆
C₃H₈
C₄H₁₀

C₅H₁₂

8.  Which one of the following emissions from car exhausts is not classed as a pollutant?

carbon dioxide
carbon monoxide
nitrogen oxides

unburnt hydrocarbons

9.  Which one of the following is not a fossil fuel?

coal
gas
oil

wood

10.  Which one of the following is a non-renewable energy source?

radioactivity
solar power
 wind power

wave power

11.  Which one of the following statements about free radicals is not true?

they are produced during the chlorination of methane in the presence of UV light
they contain a lone pair of electrons
they are formed during homolysis of covalent bonds

they are formed during the thermal cracking of hydrocarbons

12.  The order of stages in the reaction between chlorine and methane in UV light is...

propagation, initiation, termination
termination, propagation, initiation
initiation, propagation, termination

initiation, termination, propagation

13.  The first step of the reaction between chlorine and methane in UV light involves...

breaking a C-C bond
breaking a C-H bond
breaking a Cl-Cl bond

the formation of Cl¯ ions

14.  Which reaction is not a propagation step in the reaction between methane and excess chlorine?

CH₃•  +   Cl₂     ——>   CH₃Cl   +  Cl•
CH₃•  +   Cl•     ——>   CH₃Cl
Cl•   +   CH₄     ——>   CH₃•   +   HCl

CH₃Cl   +  Cl•   ——>   CH₂Cl•  +  HCl

15.  Which organic product is most likely to be present following the reaction between excess
        chlorine and methane in the presence of UV light?

CH₂Cl₂
CHCl₃
CCl₄

HCl

16.  Which of the following statements about fractional distillation of crude oil is not true?

the more volatile fractions condense further up the tower
compounds with a small number of carbon atoms are less volatile
compounds with a large number of carbon atoms condense at higher temperatures

compounds with a large number of carbon atoms are likely to be viscous

17.  Which one of the following fractions is the most volatile?

bitumen
gasoline
kerosene
naphtha

18.  Which process in the oil and petroleum industry is used to obtain cycloalkanes?

fractional distillation
cracking
isomerisation

reforming

19.  Which one of the following statements about thermal cracking is not true?

it involves a free radical mechanism
it takes place at high temperatures and pressures
it involves heterolytic fission

ethene and hydrogen are useful products

20.  Which one of the following statements about catalytic cracking is not true?

it involves breaking down more useful compounds into smaller and more useful ones
catalytic cracking involves a free radical mechanism
catalytic cracking involves heterolytic fission

catalytic cracking involves ions