Six-mark questions are extended open response questions. These require longer answers than the structured questions. It is wise to plan your answer rather than rushing straight into it, otherwise you may stray away from the key points.
Most questions on exam papers have mark schemes that give key points that are given marks. The six-mark questions are marked differently: they use a levels-based mark scheme. This type of mark scheme is used because these questions are more open-ended. To gain full marks, you need to:
Six-mark questions often use these command words:
Six-mark questions may be synoptic questions. These questions bring together ideas from two or more topics. For example, a question about fertilisers could include ideas about covalent substances, acids and alkalis, chemical calculations and effects on the environment.
The answers shown here give marking points as bullet points. You do not usually need to include all of them to gain six marks, but you do need to write in full sentences, linking them logically and clearly.
Answers are placed in three marking bands:
Questions courtesy of Eduqas.
In industry, crude oil is separated into useful fractions - petroleum gases, petrol, naphtha, paraffin, diesel oil, lubricating oil and bitumen.
Write an account of this industrial process.
Include in your answer:
Your answer should include the following:
Crude oil is a finite resource.
Explain why the fact that crude oil is a finite resource is a problem, and describe how cracking maximises the amounts of useful substances obtained from crude oil. [6 marks]