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Oxford Cambridge and RSA Examinations Foundation GCSECombined Science B Twenty First Century ScienceJ260/06: Chemistry (Higher Tier) General Certificate of Secondary Education $6.39
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Oxford Cambridge and RSA Examinations Foundation GCSECombined Science B Twenty First Century ScienceJ260/06: Chemistry (Higher Tier) General Certificate of Secondary Education
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Oxford Cambridge and RSA Examinations Foundation GCSECombined Science B Twenty First Century ScienceJ260/06: Chemistry (Higher Tier) General Certificate of Secondary Education

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  • March 17, 2024
  • 52
  • 2023/2024
  • Exam (elaborations)
  • Questions & answers

Subjects

  • oxford cambridge and rsa examinations foundation

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  • OCR
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Oxford Cambridge and RSA
Examinations Foundation
GCSECombined Science B Twenty First
Century ScienceJ260/06: Chemistry
(Higher Tier) General Certificate of
Secondary Education(with marking
scheme)

, Oxford Cambridge and RSA

Monday 22 May 2023 – Morning
GCSE (9–1) Combined Science B
(Twenty First Century Science)
J260/06 Chemistry (Higher Tier)
Time allowed: 1 hour 45 minutes


H
* 9 9 3 1 6 1 6 2 7 6 *




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 28 pages.

ADVICE
• Read each question carefully before you start your answer.




© OCR 2023 [601/8690/2] OCR is an exempt Charity
DC (CJ/CGW) 326974/4 Turn over

, 2
1 The combustion of fossil fuels for energy produces harmful substances.

(a) (i) Draw lines to connect each harmful substance with the description of its major source.


Harmful Major source
substance




Carbon monoxide


Combustion of sulfur
impurities in fossil fuels


Particulates


Incomplete combustion
of fossil fuels


Nitrogen oxides


Oxidation of nitrogen
at high temperatures.

Sulfur dioxide

[2]

(ii) Explain one problem caused by increased amounts of sulfur dioxide in the atmosphere.

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

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

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

...................................................................................................................................... [2]

(iii) Describe one method that is used to decrease the amount of harmful substances put
into the atmosphere by petrol cars.

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

...................................................................................................................................... [1]




© OCR 2023

, 3
BLANK PAGE




PLEASE DO NOT WRITE ON THIS PAGE




© OCR 2023 Turn over

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