May/June 2026 Paper 62

2026 · 4 questions · 22 parts · 40 marks

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Context for question 1
Alkanes are flammable hydrocarbons. Table 1.1 gives the boiling points of three alkanes.
Table 1.1
alkaneboiling point / C
hexane69
pentane36
undecane196
A student uses the apparatus shown in Figure 1.1 to separate a mixture of the three alkanes in Table 1.1.
Figure 1.1, distillation apparatus: a flask holding the mixture of alkanes stands in a water bath with a thermometer in its neck and is connected to the piece of apparatus labelled A, which slopes down to the vessel labelled B where the alkane collected drips.
1(a)Easy2 marks
Name the items of apparatus in Figure 1.1 labelled A and B.
item labelled A
item labelled B
1(b)(i)Easy1 mark
Draw an arrow on Figure 1.1 to show where the apparatus should be heated.
Diagram to annotate
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1(b)(ii)Easy1 mark
Explain why a Bunsen burner should not be used to heat the apparatus.

Your answer

1(c)Easy1 mark
Write a W on Figure 1.1 to show where water enters the apparatus labelled A.
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1(d)Easy1 mark
State which alkane is collected first. Give a reason for your answer.
1(e)Medium2 marks
State what, if anything, is left in the flask at the end of the experiment. Explain your answer.

Your answer