, SECTION A
Answer ALL the questions in this section. You should aim to spend no more than 20 minutes on
this section. For each question, select one answer from A to D and put a cross in the box . If
you change your mind, put a line through the box and then mark your new answer with
a cross .
1 When sodium is added to ethanol, which of the following observations would
be made?
A Colour change of orange to green
B Effervescence
C Yellow flame
D No change
(Total for Question 1 = 1 mark)
2 Which of the following substances does not have intermolecular hydrogen
bonds? A Ethanoic acid, CH3COOH
B Propanone, CH3COCH3
C Methanol, CH3OH
D Water, H2O
(Total for Question 2 = 1 mark)
3 Which of the following molecules has the lowest boiling temperature?
Pentane C3H6
A B C D
A
B
C
D
(Total for Question 3 = 1 mark)
2
*P42971A0224*
,4 Which of the following molecules has the highest melting temperature?
A B C D
A
B
C
D
(Total for Question 4 = 1 mark)
5 Which of the following isomeric alcohols, with molecular formula C 5H12O,
can be oxidized to a carboxylic acid with five carbon atoms?
OH
A
B
OH
C
OH
D OH
(Total for Question 5 = 1 mark)
3
*P42971A0324* Turn over
, 6 Consider the infrared spectrum shown
below. 100
Transmittance
/%
50
0
4000 3000 2000 1500 1000 500
Wavenumber / cm–1
The IR absorption ranges associated with some organic functional groups are given
below.
O–H stretching in alcohols (variable, broad) 3750– 3200 cm–1
O–H stretching in carboxylic acids (weak) 3300– 2500 cm–1
C=O stretching in aldehydes (strong) 1740– 1720 cm–1
C=O stretching in ketones (strong) 1700– 1680 cm–1
C=O stretching in carboxylic acids, alkyl (strong) 1725– 1700 cm–1
C–H stretching in aldehydes (weak) 2900– 2820 cm–1 and 2775 – 2700 cm–1
Which of the following could have produced the above spectrum?
A An aldehyde
B An alcohol
C A carboxylic acid
D A ketone
(Total for Question 6 = 1 mark)
4
*P42971A0424*
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