Exam (elaborations)
AS & A Level CHEMISTRY 9701/22 Paper 2 AS Level Structured Questions May/June 2023 Authentic Marking Scheme
AS & A Level CHEMISTRY 9701/22 Paper 2 AS Level Structured Questions May/June 2023 Authentic Marking Scheme
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Cambridge International AS & A Level* 9 1 0 1 9 6 5 1 5 9 *
CHEMISTRY 9701/22
Paper 2 AS Level Structured Questions May/June 2023
1 hour 15 minutes
You must answer on the question paper.
No additional materials are needed.
INSTRUCTIONS
● Answer all questions.
● Use a black or dark blue pen. You may use an HB pencil for any diagrams or graphs.
● Write your name, centre number and candidate number in the boxes at the top of the page.
● Write your answer to each question in the space provided.
● Do not use an erasable pen or correction fluid.
● Do not write on any bar codes.
● You may use a calculator.
● You should show all your working and use appropriate units.
INFORMATION
● The total mark for this paper is 60.
● The number of marks for each question or part question is shown in brackets [ ].
● The Periodic Table is printed in the question paper.
● Important values, constants and standards are printed in the question paper.
This document has 16 pages. Any blank pages are indicated.
DC (LK/SG) 308406/5
© UCLES 2023 [Turn over
, 2
1 The melting points of some solids are shown in Table 1.1.
Table 1.1
solid melting point / K
magnesium 923
phosphorus 317
sodium chloride 1074
sulfur 392
(a) (i) State the type of bonding present in magnesium and in sodium chloride.
bonding in magnesium ......................................................................................................
bonding in sodium chloride ...............................................................................................
[1]
(ii) Explain the difference in the melting points of magnesium and sodium chloride.
...........................................................................................................................................
..................................................................................................................................... [1]
(iii) Explain the difference in the melting points of phosphorus and sulfur in terms of structure
and bonding.
...........................................................................................................................................
...........................................................................................................................................
..................................................................................................................................... [2]
(b) (i) Define electronegativity.
...........................................................................................................................................
..................................................................................................................................... [1]
(ii) Explain why electronegativity increases across a period.
...........................................................................................................................................
...........................................................................................................................................
..................................................................................................................................... [2]
© UCLES 2023 9701/22/M/J/23
, 3
(iii) Name the strongest intermolecular force that exists between NH3(l) molecules.
..................................................................................................................................... [1]
(iv) Draw a diagram to show the formation of the strongest intermolecular force between
two molecules of NH3(l).
Include any relevant lone pairs of electrons and dipoles.
[2]
(v) The melting points of ice and ammonia are shown in Table 1.2.
Table 1.2
solid melting point / K
ice 273
ammonia 195
Suggest two reasons for the difference in the melting points of ice and ammonia.
...........................................................................................................................................
...........................................................................................................................................
..................................................................................................................................... [2]
[Total: 12]
© UCLES 2023 9701/22/M/J/23 [Turn over
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