CAIE A Level Chemistry 9701 · An introduction to organic chemistry
Ethene, , and ethane, , are both hydrocarbons but their molecules have different shapes.
Compare the shapes of the two molecules, including the bond angles, the hybridisation of the carbon atoms, and the arrangement of the atoms around each carbon atom. In your answer, use the term planar where appropriate.
6 marks, so the mark scheme is looking for about 6 separate creditworthy points. Making the same point twice in different words earns it once.
Compare means: Give similarities or differences between two things, and say which side each point belongs to. Write each point as a pair, for example: A is X, whereas B is Y. Two separate descriptions rarely earn the marks.
Written by Markquill to follow the Cambridge International syllabus. Markquill is independent and is not affiliated with or endorsed by Cambridge International.