bromobutane
chloropropane
ethoxyethane
3-iodopentane

2.  Which one of the following is a tertiary halogenoalkane?

1-bromobutane
2-bromobutane
1-bromo-2-methylpropane
2-bromo-2-methylpropane

3.  Which carbon-halogen bond has the greatest polarity?

C-Br
C-Cl
C-F
C-I

4.  Which carbon-halogen bond has the lowest bond enthalpy?

C-Br
C-Cl
C-F
C-I

5.  Which of the following statements about nucleophiles is incorrect?

the must possess a lone pair of electrons
they must possess a negative charge
they attack centres of positive charge
they take part in substitution reactions of halogenoalkanes

6.  In mechanisms, 'curly arrows' indicate...

the direction of the attacking species
the movement of a pair of electrons
the movement of a single electron
the movement of molecules

7.  The carbon-bromine bond in bromoethane is polar because...

bromine and carbon have similar electronegativities
bromoethane is attacked by nucleophiles
the electronegativity of carbon is greater than that of chlorine
the electronegativity of chlorine is greater than that of carbon

8.  Which one of the following species is not a nucleophile?

ammonia
cyanide ion
hydrogen
water

9.  The predominant reaction between sodium hydroxide and bromethane in aqueous solution involves...

addition
elimination
free radical substitution
nucleophilic substitution

10.  The predominant reaction between sodium hydroxide and 2-bromopropane in alcoholic solution involves...

addition
elimination
free radical substitution
nucleophilic substitution

11.  In aqueous solution, hydroxide ions act predominantly as...

bases
electrophiles
free radicals
nucleophiles

12.  Which one of the following compounds cannot be made from bromoethane in a single reaction?

C₂H₅CN
C₂H₅OH
C₂H₅NH₂
C₃H₇NH₂

13.  The important use of the reaction between potassium cyanide and halogenoalkanes is that...

it adds nitrogen to the compound
it extends the carbon chain by one carbon atom
it reduces the number of carbon atoms in the chain
it produces a stable and inert product

14.  What is the name of the compound with the formula (C₂H₅)₂NH?

diethylamine
ethylamine
triethylamine
butylamine

15.  Which of the following statements is incorrect?

the behaviour of hydroxide ions depends on the solvent
in alcoholic solution hydroxide ions behave predominantly as bases
in aqueous solution hydroxide ions behave predominantly as nucleophiles
in aqueous solution hydroxide ions behave predominantly as bases

16.  Which statement is correct about the reaction between hot alcoholic KOH and CH₃CH₂CH₂Br.

two isomeric alkenes are formed
propan-1-ol is the major organic product
only one alkene is formed
the hydroxide ion behaves predominantly as a nucleophile

17.  Which statement is incorrect about the reaction between hot alcoholic KOH and 2-bromobutane.

a mixture of alkenes is produced
the hydroxide ion behaves as a base
the hydroxide ion has a choice of protons to remove
only but-2-ene is produced

18.  How many isomeric alkenes are formed when hot alcoholic KOH reacts with 2-bromobutane?

1
2
3
4

19.  Which of the following statements about the polymerisation of chloroethene is incorrect?

it involves addition polymerisation
it produces poly(chloroethene)
it produces polyvinylchloride (PVC)
the repeating unit is -(CHCl-CHCl)-

20.  Which of the following is not a CFC?

dichlorofluoromethane
trichlorofluoromethane
bromochlorodifluoromethane
trichloromethane

21.  Which of the following is not a use of dichlorofluoromethane?

aerosol propellant
blowing agent
paint solvent
refrigerant

22.  Which of the following statements is incorrect?

the ozone layer protects earth from harmful UV radiation
CFC's break up in the atmosphere to form radicals by heterolysis
free radicals speed up the breakdown of ozone
ozone molecules contain three oxygen atoms

23.  Which of the following statements about the preparation of halogenoalkanes is incorrect?

they can be made from alkanes by a free radical substitution reaction
they can be made from alkenes by electrophilic addition
they can be made from alkenes by nucleophilic addition
they can be made from alcohols and hydrogen halides

24.  The number of structural isomers of formula C₄H₉Br is...

2
3
4
5

25.  How many of the structural isomers of formula C₄H₉Br are primary halogenoalkanes?

1
2
3
4