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MERGED QUESTION PAPER AND MARK SCHEME 2025 Pearson Edexcel GCE A Level In Chemistry (9CH0)Paper 03: General and Practical Principles in Chemistry

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MERGED QUESTION PAPER AND MARK SCHEME 2025 Pearson Edexcel GCE A Level In Chemistry (9CH0)Paper 03: General and Practical Principles in Chemistry

Institution
Chemistry

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Pearson Edexcel Level 3 GCE
Friday 20 June 2025
Morning (Time: 2 hours 30 minutes) Paper
reference 9CH0/03
Chemistry  


Advanced
PAPER 3: General and Practical Principles in Chemistry

, Answer ALL questions.
Write your answers in the spaces provided.




DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA
1 This question is about ionisation energies.
The table shows the first four ionisation energies of three elements in the same group
of the Periodic Table.
The letters used are not the symbols of the elements.

First ionisation Second ionisation Third ionisation Fourth ionisation
Element energy energy energy energy
/ kJ mol−1 / kJ mol−1 / kJ mol−1 / kJ mol−1

X 403 2632 3900 5080

Y 419 3051 4412 5877

Z 496 4563 6913 9544

(a) State what is meant by the term ‘first ionisation energy’.
(2)

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(b) Explain to which group the elements X, Y and Z belong.
(2)

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2
*P77834A0236* 

, (c) Explain which of the elements X, Y and Z has the highest atomic number.
(3)
DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA




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(Total for Question 1 = 7 marks)




3
 *P77834A0336* Turn over

, 2 This question is about compounds that contain both an alkene and an alcohol
functional group.




DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA
(a) Prop-2-en-1-ol, present in garlic, has the structure shown.

H CH2OH
C C
H H

(i) Describe a test, and the positive result, that confirms the presence of a
C C group.
(2)
Test

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Result

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(ii) Prop-2-en-1-ol reacts with hydrogen bromide to form 3-bromopropan-1-ol as
one of the products.
Draw a mechanism for this reaction.
Include curly arrows, and relevant lone pairs and dipoles.
(3)


H CH2OH
C C
H
H




4



*P77834A0436* 

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