6 MARK QUESTION – Cracking
Oil companies use cracking to convert some of the molecules in the kerosene fraction into molecules with fewer carbon atoms.
Cracking can also be carried out on a small scale using liquid paraffin in a school laboratory.
Describe how cracking can be carried out in the laboratory experiment, explaining why it is necessary for oil companies to use cracking on some fractions obtained from crude oil.
Answers
Explanation:
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P45928A
©2016 Pearson Education Ltd.
1/1/1/1/
*P45928A0120*
Chemistry/Science
Unit C1: Chemistry in Our World
Higher Tier
Thursday 19 May 2016 – Morning
Time: 1 hour 5CH1H/01
You must have:
Calculator, ruler
Instructions
• Use black ink or ball-point pen.
• Fill in the boxes at the top of this page with your name,
centre number and candidate number.
• Answer all questions.
• Answer the questions in the spaces provided
– there may be more space than you need.
Information
• The total mark for this paper is 60.
• The marks for each question are shown in brackets
– use this as a guide as to how much time to spend on each question.
• Questions labelled with an asterisk (*) are ones where the quality of your
written communication will be assessed
– you should take particular care with your spelling, punctuation and grammar, as
well as the clarity of expression, on these questions.
Advice
• Read each question carefully before you start to answer it.
• Try to answer every question.
• Check your answers if you have time at the end.
Pearson
Edexcel GCSE