2024 Pearson Edexcel GCSE In Chemistry (1CH0) Paper 1F question paper and marking scheme (merged)

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Pearson Edexcel Level 1/Level 2 GCSE (9–1)
Friday 17 May 2024
Morning (Time: 1 hour 45 minutes) Paper
reference 1CH0/1F
Chemistry
Pearson Edexcel GCSE In
Chemistry (1CH0) Paper 1F
1

Tier
Total Marks




Instructions

• Use black ink or ball-point pen.
centre number and candidate number.

Answer the questions in the spaces provided
– there may be more space than you need.


• You must show all your working out with your answer clearly identified at the
Information

The marks for each question are shown in brackets
– use this as a guide as to how much time to spend on each question.
In questions marked with an asterisk (*), marks will be awarded for your ability to
structure your answer logically, showing how the points that you make are related or
follow on from each other where appropriate.
Advice
Read each question carefully before you start to answer it.

• Check your answers if you have time at the end.
Turn over

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

Some questions must be answered with a cross in a box . If you change your mind about an
answer, put a line through the box and then mark your new answer with a cross .

1 Figure 1 shows a test tube being heated in a beaker of water.




wax




heat



Figure 1

The test tube contains solid wax.

As the test tube was heated, the solid wax changed to liquid wax.
After heating, the wax was allowed to cool to room temperature.

(a) Figure 2 shows the arrangement of particles in liquid wax.




Figure 2

Draw the arrangement of particles in solid wax in the box in Figure 3.
(1)




Figure 3




2

■■■■

, (b) When the wax cools, it changes from a liquid back to a solid.
This change is a physical change.

(i) What name is given to the change of a liquid to a solid?
(1)
A condensing

B evaporating

C freezing
D melting


(ii) Explain why the change from a liquid to a solid is a physical change rather
than a chemical change.
(2)

. . . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. .. . . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . . .. . .. .. . . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. .. . . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . . ......................



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. . . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. .. . . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . . .. . .. .. . . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. .. . . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . . ......................



. . . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. .. . . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . . .. . .. .. . . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. .. . . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . . ......................




(c) Another physical change is when a liquid changes into a gas.
(i) Which row shows the movement and arrangement of the particles in a gas?
(1)



A slow regular

B slow random

C fast regular

D fast random



(ii) Suggest why the wax did not change into a gas when the test tube was
heated in the beaker of water.
(1)

. . . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. .. . . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . . .. . .. .. . . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. .. . . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . . ......................



. . . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. .. . . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . . .. . .. .. . . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . . . . .. . .. . .. . .. .. . . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . . ......................



(Total for Question 1 = 6 marks)



3

■■■■ Turn over

, 2 (a) Nitrogen reacts with hydrogen to form ammonia.
The reaction is reversible.

(i) Complete the word equation for the reaction by adding the symbol to show
that the reaction is reversible.
(1)

nitrogen + hydrogen ammonia
...........................................


(ii) Figure 4 shows the electronic configuration of an atom of hydrogen.



H


Figure 4

Complete the dot and cross diagram for a molecule of hydrogen, H2 .
(1)


H H




4

■■■■