CAIE A Level Chemistry 9701 · Halogen compounds
Chloroethane and chlorobenzene are both halogeno compounds. A student adds aqueous silver nitrate to separate samples of each compound and warms the mixtures. The student observes that chloroethane reacts readily, forming a precipitate, but chlorobenzene does not react.
Compare the reactivity of chloroethane and chlorobenzene, and explain the difference in terms of the bonding and structure of the two compounds.
5 marks, so the mark scheme is looking for about 5 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.