←Global challenges
From Paper 4, Higher
Describe how bioleaching extracts copper and one advantage of it.
From Paper 4, Higher
Describe the structure and properties of carboxylic acids such as ethanoic acid.
From Paper 4, Higher
Compare soda-lime glass and borosilicate glass.
From Paper 4, Higher
Write a half equation for the oxidation of magnesium atoms.
From Paper 4, Higher
Describe how a condensation polymer such as a polyester is formed.
From Paper 4, Higher
Explain why composites such as reinforced concrete are useful.
From Paper 4, Higher
Describe the structure of DNA, proteins and starch as naturally occurring polymers.
From Paper 4, Higher
Evaluate the use of plastic bags compared with paper bags using life cycle assessment.
From Paper 4, Higher
Write the structural formula of propene and give the product when it reacts with hydrogen.
From Paper 4, Higher
Explain why sustainable development is important in the chemical industry.
From Paper 4, Higher
Describe the conditions used in fermentation to produce ethanol and why each is needed.
From Paper 4, Higher
Explain how iron is extracted from iron(III) oxide in a blast furnace and why carbon can be used.
From Paper 4, Higher
Describe how crude oil is separated by fractional distillation.
From Paper 4, Higher
Describe how the Earth's early atmosphere changed to form today's atmosphere.
From Paper 4, Higher
Describe how potable water is produced from fresh water in the UK.
From Paper 4, Higher
Explain why aluminium is extracted by electrolysis rather than reduction with carbon.
From Paper 4, Higher
Explain why cracking is carried out.
Score 0 / 55 · 0 of 17 marked
This paper is written by Plasmo in the style of the OCR GCSE Chemistry exam. It is not a past paper and is not produced or endorsed by the exam board.