2025 Specimen Paper 6
2025 Specimen Paper 6
2025 Specimen Paper 6
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INSTRUCTIONS
● Answer all questions.
● Use a black or dark blue pen. You may use an HB pencil for any diagrams or graphs.
● Write your name, centre number and candidate number in the boxes at the top of the page.
● Write your answer to each question in the space provided.
● Do not use an erasable pen or correction fluid.
● Do not write on any bar codes.
● You may use a calculator.
● You should show all your working and use appropriate units.
INFORMATION
● The total mark for this paper is 40.
● The number of marks for each question or part question is shown in brackets [ ].
● Notes for use in qualitative analysis are provided in the question paper.
The student is provided with half an apple and some apple juice.
Fig. 1.1
(a) In the box, make a large drawing of the cut surface of the apple shown in Fig. 1.1.
[3]
© Cambridge University Press & Assessment 2022 0653/06/SP/25
3
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DCPIP is a dark blue solution that turns colourless when vitamin C is added.
The greater the amount of vitamin C in the apple juice, the fewer the drops of apple juice
needed to turn the DCPIP colourless.
Procedure
The student:
The student repeats the procedure and records the volume of apple juice remaining in the
syringe for experiment 2 in Table 1.1.
Fig. 1.2 shows the volume of apple juice remaining in the syringe in experiment 3.
cm3
10
9
8
7
6
5
4
3
2
apple juice remaining
1
Fig. 1.2
(i) Record in Table 1.1 the volume of apple juice remaining in the syringe in experiment 3.
Table 1.1
(ii) Calculate the volume of apple juice added to the DCPIP in experiment 3.
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[Total: 7]
Plan an investigation to determine the relationship between light intensity and the volume of
oxygen gas produced by the aquatic plant.
test-tube
water
funnel
aquatic plant
Fig. 2.1
You may use any other common laboratory apparatus in your plan.
You may include a results table (you are not required to enter any readings in the table).
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3 A student investigates the reaction between metal F and dilute sulfuric acid.
The student:
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(ii) The student repeats the procedure in (a)(i) but also adds aqueous copper(II) sulfate to
the dilute sulfuric acid and metal F.
The student observes that this reaction is faster than the reaction in (a)(i).
Suggest one observation the student makes which shows that this reaction is faster.
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(iii) Procedure
The student:
• pours a small volume of the aqueous product from the procedure in (a)(i) into
a test‑tube
• adds aqueous sodium hydroxide
• observes a white precipitate.
Use this observation to suggest two possible identities for the cation produced from
metal F.
(b) Procedure
The student:
stopper
trough
Fig. 3.1
(i) Fig. 3.2 shows the stop-watch readings for 5 cm3 and 25 cm3 of gas collected.
Fig. 3.2
Record in Table 3.1 the time taken to the nearest second to collect 5 cm3 and 25 cm3
of gas.
Table 3.1
(ii) State the independent variable and the dependent variable in this investigation.
(iii) On the grid, plot a graph of volume of gas collected (vertical axis) against time taken.
[3]
(v) Describe the relationship between the volume of gas collected and the time taken.
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(vi) Suggest one possible source of error in the measurement of the time taken.
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(vii) Suggest one way to obtain a more accurate measurement of the volume of gas collected.
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[Total: 13]
4 A student determines the density of the material used to make a metre rule.
(a) Fig. 4.1 shows the metre rule (not drawn to scale).
w
t
metre rule
(i) On Fig. 4.1, draw a double-headed arrow (↔) to show the length L of the metre rule. [1]
(ii) Fig. 4.2 shows the actual size of the end of the metre rule.
Use a ruler to measure width w and thickness t of the metre rule in Fig. 4.2.
w = .......................................................... cm
t = .......................................................... cm
[2]
(iii) The measurements in (a)(ii) are recorded to the nearest 0.1 cm.
State why it is not appropriate to record the measurements to the nearest 0.01 cm.
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V=L×w×t
(b) The student determines the mass M of the metre rule using a balancing method.
Procedure
The student:
step 1 places a pivot directly under the 60.0 cm mark on the metre rule.
d = 60.0 cm x1
load
pivot
bench
step 2 places a load on the metre rule and adjusts the position of the load so that the rule
balances
step 3 records that the centre of the load is directly above the 67.1 cm mark on the metre
rule.
(i) Calculate the distance x1 from the centre of the load to the pivot.
x1 = ..................................................... cm [1]
step 5 adjusts the position of the load so that the metre rule balances
step 6 records that the centre of the load is directly above the 84.2 cm mark on the
metre rule.
(ii) Calculate the distance x2 from the centre of the load to the pivot.
x2 = ..................................................... cm [1]
(iii) Use the results for (b)(i) and (b)(ii) to calculate the mass M of the metre rule.
M = 5 (x1 + x2)
M = ........................................................ g [1]
0.1 g
Fig. 4.4
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(d) Use your answers to (a)(iv) and (b)(iii) to calculate the density ρ of the material used to make
the metre rule.
M
ρ=
V
ρ = ................................................................
unit = ................................................................
[3]
[Total: 13]
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