Pearson Edexcel Level 3 GCE. Chemistry Advanced 9CH0/02: PAPER 2: Advanced Organic and Physical Chemistry (Summer 2024)

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Pearson Edexcel Level 3 GCE
Tuesday 18 June 2024
Morning (Time: 1 hour 45 minutes) Paper
reference 9CH0/02
Chemistry  


Advanced
PAPER 2: Advanced Organic and Physical Chemistry

You must have: Total Marks
Scientific calculator, Data Booklet, ruler



Instructions
• Use black ink or ball‑point pen.
• IfFillpencil is used for diagrams/sketches/graphs it must be dark (HB or B).
• centre number
in the boxes at the top of this page with your name,
and candidate number.
• Answer all questions.
• Answer the questions in the spaces provided
– there may be more space than you need.

Information
• The total mark for this paper is 90.
• The marks for each question are shown in brackets
– use this as a guide as to how much time to spend on each question.
• toForstructure
the question marked with an asterisk (*), marks will be awarded for your ability
your answer logically, showing the points that you make are related or
follow on from each other where appropriate.
• A Periodic Table is printed on the back cover of this paper.

Advice
• Read each question carefully before you start to answer it.
• Show all your working in calculations and include units where appropriate.
• your answers if you have time at the end.
Check
Turn over


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©2024 Pearson Education Ltd.
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, Answer ALL questions.

Some questions must be answered with a cross in a box . If you change your mind about an




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answer, put a line through the box and then mark your new answer with a cross .

1 This question is about organic compounds that contain a halogen atom or a
nitrogen atom.

(a) Equal amounts of four bromoalkanes were added to separate test tubes
containing 2 cm3 of a silver nitrate solution.
The mixtures were heated in a water bath.
Which bromoalkane would be the first to form a precipitate?
(1)
A 1‑bromobutane

B 2‑bromobutane

C 1‑bromo‑2‑methylpropane

D 2‑bromo‑2‑methylpropane


(b) Which pair of reactants will form an N‑substituted amide?
(1)
A CH3COCl and NH3

B CH3CH2OH and NH3

C CH3COCl and CH3NH2

D CH3CH2OH and CH3NH2




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, (c) Ammonia reacts with bromoethane as shown.

2NH3 + CH3CH2Br → NH4Br + CH3CH2NH2
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(i) Explain, by referring to the reaction mechanism, the roles of ammonia in the
formation of each of the products of this reaction.
(3)

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(ii) What conditions are needed for this reaction?
(1)

Method of heating Solvent

A heat in a sealed tube ethanol

B heat under reflux ethanol

C heat in a sealed tube water

D heat under reflux water




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, (d) The halogenoalkane, 1‑bromobutane, can be formed by the reaction of
butan‑1‑ol with sodium bromide and sulfuric acid.




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CH3CH2CH2CH2OH + NaBr + H2SO4 → CH3CH2CH2CH2Br + NaHSO4 + H2O

Calculate the atom economy, by mass, for the formation of 1‑bromobutane.
Give your answer to one decimal place.
[Ar values: H = 1.0 C = 12.0 O = 16.0 Na = 23.0 S = 32.1 Br = 79.9]
(2)




(Total for Question 1 = 8 marks)




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