Download 2024 AQA GCSE COMBINED SCIENCE: TRILOGY 8464/C/2F Foundation Tier Chemistry Paper 2F Ver and more Exams Science education in PDF only on Docsity!
2024 AQA GCSE COMBINED SCIENCE: TRILOGY
8464/C/2F Foundation Tier Chemistry Paper 2F
Verified Question Paper with Marking Scheme Combined.
June 2024
Materials
For this paper you must have:
- a ruler
- a scientific calculator
- the periodic table (enclosed).
Instructions
- Use black ink or black ball-point pen.
- Pencil should only be used for drawing.
- Fill in the boxes at the top of this page.
- Answer all questions in the spaces provided.
- If you need extra space for your answer(s), use the lined pages at the end of this
book. Write the question number against your answer(s).
- Do all rough work in this book. Cross through any work you do not want to be
marked.
- In all calculations, show clearly how you work out your answer.
Information
- The maximum mark for this paper is 70.
- The marks for questions are shown in brackets.
- You are expected to use a calculator where appropriate.
- You are reminded of the need for good English and clear presentation in your answers.
For Examiner’s Use
Question Mark
1 2 3 4 5 6 7
TOTAL
Do not write
outside the
box
0 1 The Earth’s atmosphere has changed during the last 4.6 billion years.
What is the approximate percentage of nitrogen and of oxygen in the Earth’s
atmosphere today?
Draw one line from each gas to the percentage of that gas.
[2 marks]
The approximate percentage of carbon dioxide in the Earth’s early atmosphere was 95%.
Which are two reasons why the percentage of carbon dioxide has decreased since the Earth’s
early atmosphere?
[2 marks]
Tick ( ) two boxes.
Combustion of fuels
Deforestation
Dissolving in oceans
Photosynthesis
Respiration
Do not write
outside the
box
Turn over ►
Do not write
outside the
box
Carbon dioxide is a greenhouse gas.
. 4 Which of the following is also a greenhouse gas?
[1 mark]
Tick ( ) one box.
Argon
Methane
Nitrogen
Oxygen
Which of the following is an environmental problem caused by greenhouse gases?
[1 mark]
Tick ( ) one box.
Acid rain Climate
change
Global dimming
Do not write
outside the
box
Turn over ►
Do not write
outside the
box There are no questions printed on this page
DO NOT WRITE ON THIS PAGE ANSWER IN
THE SPACES PROVIDED
Do not write
outside the
box
Different tests can be used to identify chemicals.
Turn over ►
Do not write
outside the
box
Anhydrous copper sulfate can be used to test for water.
The word equation for the reaction is:
anhydrous copper sulfate + water ⇌ hydrated copper sulfate
. 2 Complete the sentence.
Choose answers from the box.
[2 marks]
blue green red white yellow
When water is added to anhydrous copper sulfate, the colour changes
from to.
The reaction between anhydrous copper sulfate and water is reversible.
How does the word equation show that the reaction is reversible?
[1 mark]
Do not write
outside the
box Turn over ►
Do not write
outside the
box
. 1 What is the name given to a mixture that has been designed as a useful product?
[1 mark]
Tick ( ) one box.
Formula
Formulation
Fraction
A student used chromatography to investigate the colours in a printer ink.
Figure 2 shows the chromatogram.
Figure 2
0 3 Printer ink is a mixture of chemicals.
Do not write
outside the
. 4 Table 2 shows the R f
values of four blue colours.
Table 2
Blue colour R f
Cerulean 0.
Cobalt 0.
Prussian 0.
Ultramarine 0.
The student determined that the R f
value of the blue colour in the printer ink was 0.
Suggest which blue colour was used in the printer ink.
box
Give one reason for your answer.
[2 marks]
Blue colour
Reason
Do not write
outside the
box
0 4 Tap water must be safe to drink.
1 What name is given to water that is safe to drink?
[1 mark]
Tick (✓) one box.
Ground water
Potable water
Waste water
. Water is sterilised to make the water safe to drink.
Which two of the following are used to sterilise drinking water?
Tick (✓) two boxes.
[2 marks]
Carbon dioxide
Electrolysis
Filtration
Ozone
Ultraviolet light
Question 4 continues on the next page
Turn over ►
Do not write
outside the
. Table 3 shows the results.
box
Table 3
Type of
water
Mass in grams
Evaporating
basin
Evaporating basin and
dissolved solids
Dissolved
solids
River 112.1 113.1 1.
Sea 110.5 114.0 X
Tap 115.3 115.4 0.
Calculate value X in Table 3.
[1 mark]
X = g
Identify the variables used in the investigation.
Draw one line from each variable to the example of the variable.
[2 marks]
Turn over ►
Do not write
outside the
Table 4 shows the mass of different types of ions dissolved
in 1 dm
3
of sea water.
Table 4
box
Type of ion
Mass of type of ion dissolved in
1 dm
3
of sea water in grams
Calcium 0.
Magnesium 1.
Sulfate 2.
