Various options are provided as possible answers to the following questions. Choose
the answer and write only the letter (A–D) next to the question numbers (1.1 to 1.10) in
the ANSWER BOOK, e.g. 1.11 E.
1.1 Which ONE of the following is the general formula for the alkanes? (2)
1.2 The EMPIRICAL FORMULA of hexanoic acid is … (2)
1.3 Which ONE of the following is the CORRECT structural formula for
METHYL ETHANOATE? (2)
1.4 Zinc (Zn) granules react as follows with EXCESS hydrochloric acid solution,
HCℓ(aq):
Which ONE of the following combinations of volume and concentration of
HCℓ(aq) will result in the highest INITIAL reaction rate for the same mass of
zinc granules used? (Assume that the zinc granules are completely covered (2)
by the acid in all cases.)
1.5 The role of a catalyst in a chemical reaction is to increase the …
A yield.
B activation energy.
C heat of reaction.
D rate of the reaction. (2)
1.6 Consider the equilibrium represented by the balanced equation below:
Which ONE of the following changes to the equilibrium will favour the forward
reaction? (2)
1.7 The conjugate base of is
is … (2)
1.8 Which ONE of the following reactions will proceed spontaneously under (2)
standard conditions?
1.9 The simplified diagram below represents an electrochemical cell used for the
PURIFICATION of copper.
Which ONE of the graphs below represents the CHANGE IN MASS of
electrodes P and Q during the purification process? (2)
1.10 Eutrophication in water is caused by …
A algal bloom.
B bacterial nitrogen fixation.
C an increase in plant nutrients.
D a depletion of oxygen concentration. (2)
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