Oxford Cambridge and RSA
Friday 17 May 2024 – Morning
GCSE (9–1) Combined Science B
(Twenty First Century Science)
J260/06 Chemistry (Higher Tier)
Time allowed: 1 hour 45 minutes
H
* 1 3 7 8 8 2 1 3 9 7 *
You must have:
• a ruler (cm/mm)
• the Data Sheet for GCSE (9-1) Combined Science
(Chemistry) B (inside this document)
You can use:
• an HB pencil
• a scientific or graphical calculator
* J 2 6 0 0 6 *
Please write clearly in black ink. Do not write in the barcodes.
Centre number Candidate number
First name(s)
Last name
INSTRUCTIONS
• Use black ink. You can use an HB pencil, but only for graphs and diagrams.
• Write your answer to each question in the space provided. If you need extra space use
the lined pages at the end of this booklet. The question numbers must be clearly shown.
• Answer all the questions.
• Where appropriate, your answer should be supported with working. Marks might be
given for using a correct method, even if your answer is wrong.
INFORMATION
• The total mark for this paper is 95.
• The marks for each question are shown in brackets [ ].
• Quality of extended response will be assessed in questions marked with an asterisk (*).
• This document has 24 pages.
ADVICE
• Read each question carefully before you start your answer.
© OCR 2024 [601/8690/2] OCR is an exempt Charity
DC (PQ/FC) 342832/2 Turn over
, 2
1
(a) Table 1.1 shows the diameters of some particles.
Table 1.1
Particle Diameter (m)
Carbon atom 1.54 × 10–10
Fullerene molecule 1.10 × 10–9
Silver atom 2.88 × 10–10
Platinum nanoparticle 1.00 × 10–8
(i) Which two particles have diameters with the same order of magnitude?
....................................................................... and ....................................................................... [1]
(ii) Write down the particles in order of diameter.
Smallest ........................................
........................................
........................................
Largest ........................................
[2]
(b) Nanoparticles make effective catalysts because they have a high surface area to volume ratio.
Table 1.2 shows the surface area to volume ratio of some different sized particles.
Table 1.2
Particle of Particle of
Nanoparticle
Fine Powder Coarse Powder
Size of Particle (nm) 60 600 6000
Surface Area to
0.1 0.01 0.001
Volume Ratio
Describe the relationship between the size of a particle and its surface area to volume ratio.
..........................................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
..................................................................................................................................................... [2]
© OCR 2024
, 3
(c) The nanoparticle shown is a cube. This nanoparticle has a volume of 1000 nm3.
h
l w
NOT TO SCALE
Calculate the surface area of the nanoparticle.
Use the formula: surface area = 6 × (h × w)
Surface area = ....................................................... nm2
[3]
© OCR 2024 Turn over
, 4
2 A student is investigating the reaction between calcium hydroxide and hydrochloric acid.
Ca(OH)2(s) + 2HCl (aq) CaCl 2(aq) + 2H2O(l)
(a) They want to find the temperature change during the reaction.
1 g masses of solid calcium hydroxide are added one by one to 50 cm3 of dilute hydrochloric acid
in a plastic cup.
Describe two measurements the student needs to make and the apparatus needed to make the
measurements.
1. ......................................................................................................................................................
..........................................................................................................................................................
2. ......................................................................................................................................................
..........................................................................................................................................................
[2]
(b) The table shows the student’s results:
Mass of calcium hydroxide (g) Temperature of hydrochloric acid (°°C)
0 22.0
1 29.5
2 37.0
3 44.5
4 52.0
5 59.5
Plot the results from the table on the graph.
Two points have already been plotted. [2]
(c) Draw a line of best fit. [1]
© OCR 2024
Friday 17 May 2024 – Morning
GCSE (9–1) Combined Science B
(Twenty First Century Science)
J260/06 Chemistry (Higher Tier)
Time allowed: 1 hour 45 minutes
H
* 1 3 7 8 8 2 1 3 9 7 *
You must have:
• a ruler (cm/mm)
• the Data Sheet for GCSE (9-1) Combined Science
(Chemistry) B (inside this document)
You can use:
• an HB pencil
• a scientific or graphical calculator
* J 2 6 0 0 6 *
Please write clearly in black ink. Do not write in the barcodes.
Centre number Candidate number
First name(s)
Last name
INSTRUCTIONS
• Use black ink. You can use an HB pencil, but only for graphs and diagrams.
• Write your answer to each question in the space provided. If you need extra space use
the lined pages at the end of this booklet. The question numbers must be clearly shown.
• Answer all the questions.
• Where appropriate, your answer should be supported with working. Marks might be
given for using a correct method, even if your answer is wrong.
INFORMATION
• The total mark for this paper is 95.
• The marks for each question are shown in brackets [ ].
• Quality of extended response will be assessed in questions marked with an asterisk (*).
• This document has 24 pages.
ADVICE
• Read each question carefully before you start your answer.
© OCR 2024 [601/8690/2] OCR is an exempt Charity
DC (PQ/FC) 342832/2 Turn over
, 2
1
(a) Table 1.1 shows the diameters of some particles.
Table 1.1
Particle Diameter (m)
Carbon atom 1.54 × 10–10
Fullerene molecule 1.10 × 10–9
Silver atom 2.88 × 10–10
Platinum nanoparticle 1.00 × 10–8
(i) Which two particles have diameters with the same order of magnitude?
....................................................................... and ....................................................................... [1]
(ii) Write down the particles in order of diameter.
Smallest ........................................
........................................
........................................
Largest ........................................
[2]
(b) Nanoparticles make effective catalysts because they have a high surface area to volume ratio.
Table 1.2 shows the surface area to volume ratio of some different sized particles.
Table 1.2
Particle of Particle of
Nanoparticle
Fine Powder Coarse Powder
Size of Particle (nm) 60 600 6000
Surface Area to
0.1 0.01 0.001
Volume Ratio
Describe the relationship between the size of a particle and its surface area to volume ratio.
..........................................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
..................................................................................................................................................... [2]
© OCR 2024
, 3
(c) The nanoparticle shown is a cube. This nanoparticle has a volume of 1000 nm3.
h
l w
NOT TO SCALE
Calculate the surface area of the nanoparticle.
Use the formula: surface area = 6 × (h × w)
Surface area = ....................................................... nm2
[3]
© OCR 2024 Turn over
, 4
2 A student is investigating the reaction between calcium hydroxide and hydrochloric acid.
Ca(OH)2(s) + 2HCl (aq) CaCl 2(aq) + 2H2O(l)
(a) They want to find the temperature change during the reaction.
1 g masses of solid calcium hydroxide are added one by one to 50 cm3 of dilute hydrochloric acid
in a plastic cup.
Describe two measurements the student needs to make and the apparatus needed to make the
measurements.
1. ......................................................................................................................................................
..........................................................................................................................................................
2. ......................................................................................................................................................
..........................................................................................................................................................
[2]
(b) The table shows the student’s results:
Mass of calcium hydroxide (g) Temperature of hydrochloric acid (°°C)
0 22.0
1 29.5
2 37.0
3 44.5
4 52.0
5 59.5
Plot the results from the table on the graph.
Two points have already been plotted. [2]
(c) Draw a line of best fit. [1]
© OCR 2024
