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Official Summer 2024 OCR GCSE Chemistry B Twenty First Century Science J258/04: Depth in Chemistry (Higher Tier) Merged Question Paper + Mark Scheme + Data Sheet$7.99
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Official Summer 2024 OCR GCSE Chemistry B Twenty First Century Science J258/04: Depth in Chemistry (Higher Tier) Merged Question Paper + Mark Scheme + Data Sheet
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Course
Official Summer 2024 OCR GCSE
Institution
Official Summer 2024 OCR GCSE
Official Summer 2024
OCR
GCSE
Chemistry B Twenty First Century Science
J258/04: Depth in Chemistry (Higher Tier)
Merged Question Paper + Mark Scheme + Data
Sheet
OCR
GCSE
Chemistry B Twenty First Century Science
J258/04: Depth in Chemistry (Higher Tier)
Merged Question Paper + Mark Scheme + Data
Sheet
Ace your Mocks!!!
, Oxford Cambridge and RSA
Tuesday 11 June 2024 – Morning
GCSE (9–1) Chemistry B (Twenty First Century Science)
J258/04 Depth in Chemistry (Higher Tier)
Time allowed: 1 hour 45 minutes
H
You must have:
* 1 3 7 6 7 5 1 4 9 7 *
• a ruler (cm/mm)
• the Data Sheet for GCSE (9–1) Chemistry B
(inside this document)
You can use:
• a scientific or graphical calculator
• an HB pencil
* J 2 5 8 0 4 *
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 90.
• 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 32 pages.
ADVICE
• Read each question carefully before you start your answer.
(b) The UK government says that the mass of carbon dioxide added to the air during the year 2020
decreased by 400 million tonnes compared to 1990. This is a decrease of 49%.
Calculate the mass of carbon dioxide added to the air during 1990.
decrease in mass
Use the formula: percentage decrease = × 100
mass added to the air during 1990
Mass added to the air during 1990 = .................................. million tonnes [3]
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