Explain how iron is extracted from iron(III) oxide in a blast furnace and why carbon can be used.
From Paper 10 (Chemistry), Higher
54 marks
Describe how crude oil is separated by fractional distillation.
From Paper 10 (Chemistry), Higher
64 marks
Describe how the Earth's early atmosphere changed to form today's atmosphere.
From Paper 10 (Chemistry), Higher
74 marks
Describe how potable water is produced from fresh water in the UK.
From Paper 10 (Chemistry), Higher
113 marks
Explain why aluminium is extracted by electrolysis rather than reduction with carbon.
From Paper 10 (Chemistry), Higher
123 marks
Explain why cracking is carried out.
From Paper 10 (Chemistry), Higher
136 marks
Evaluate the evidence that human activities are causing climate change.
From Paper 10 (Chemistry), Higher
143 marks
Explain why desalination is used in some countries and why it is expensive.
Score 0 / 31 · 0 of 8 marked
This paper is written by Plasmo in the style of the OCR GCSE Combined Science exam. It is not a past paper and is not produced or endorsed by the exam board.