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6.2 Organic chemistry

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Question 3
F

One molecule of C15H32\mathrm{C_{15}H_{32}}C15​H32​ is cracked. The products are one molecule of ethene, C2H4\mathrm{C_{2}H_{4}}C2​H4​, two molecules of propene, C3H6\mathrm{C_{3}H_{6}}C3​H6​, and one molecule of an alkane, X.

What is the formula of X?

[1]
A

C10H22\mathrm{C_{10}H_{22}}C10​H22​

B

C9H20\mathrm{C_{9}H_{20}}C9​H20​

C

C7H14\mathrm{C_{7}H_{14}}C7​H14​

D

C7H16\mathrm{C_{7}H_{16}}C7​H16​

Markscheme

6.2 Organic chemistry Questions

  1. GCSE
  2. /Chemistry
  3. /6.2 Organic chemistry

63 exam-style questions on OCR GCSE Chemistry 6.2 Organic chemistry, covering 6.2.1 Crude oil and fractional distillation, 6.2.2 Cracking and dependence on hydrocarbons, 6.2.3 Functional groups and homologous series, 6.2.4 Reactions of alkanes, alkenes and alcohols, 6.2.5 Addition polymerisation and repeat units, 6.2.6 Naturally occurring polymers, 6.2.7 Chemical cells and fuel cells, and 6.2.8 Condensation polymerisation and how to make one. Each one has a worked solution and a mark scheme showing where the marks go.

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