aqa-a-level-chemistry-practice-paper-2-2023

Practice Paper
_Please write clearly in block capitals

Centre number_ Candidate number_


Surname ___________________________________________________

Forename(s) ___________________________________________________

Candidate signature ___________________________________________________
I declare this my own work


A-level
CHEMISTRY
Paper 2 Organic and Physical Chemistry
Time allowed: 2 hours

Materials For Examiner’s Use
For this paper, you must have:
• the Periodic Table/Data Booklet, provided as an insert Question Mark
• a ruler with millimetre measurements
• a scientific calculator 1

Instructions 2
• Use black ink or ball-point pen.
• Fill in the boxes at the top of this page. 3
• You must answer all questions.
• You must answer the questions in the spaces provided. Do not 4
• write outside the box around each page or on blank pages.
• If you need extra space for your answer(s), use the lined page(s) 5
• at the back of this book, clearly indicating the question number.
• All working must be shown. 6
• Do all rough work in this book. Cross through any work you do
7
• not want to be marked.
Information 8
• The marks for questions are shown in brackets.
• The maximum mark for this paper is 105. 9

Disclaimer 10
• This paper is not official material produced by AQA. Interpret the
• paper as you will, but the questions should not be taken to be 11
• accurate predictions for the upcoming exam series.
TOTAL

, 2




_01 Skatole is the compound that is most responsible for the smell of faeces.
Figure 1 shows the skeletal formula of skatole.
Figure 1




_01.1 Write down the molecular formula of skatole.

[1 mark]


________________________________________________________________

_01.2 Calculate the number of atoms in 2.0 grams of skatole, giving your answer to an
appropriate number of significant figures.

[3 marks]


________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________

Number of atoms = _____________

, 3




_01.3 Predict the shape of the nitrogen atom in a molecule of skatole.
Justify your answer.

[3 marks]

_Shape of nitrogen atom:

________________________________________________________________

_Justification:

________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________

_01.4 Draw the displayed formula of skatole in the space below.

[1 mark]

, 4




_02.1 Three organic compounds are to be identified using test tube reactions.
In no particular order, the compounds are known to be cyclohexene, butanoic acid and
oct-2-enoic acid.
Two test tube reactions are proposed to assist with the identification of these compounds:
(1) Heat the sample gently with ethanol and a few drops of concentrated sulphuric acid.
(2) Add a few drops of a solution containing starch and iodine to the sample.
Describe what would be observed when each of the organic compounds undergo the
proposed tests and include equations for any reactions that may occur.

[6 marks]


________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________