CAIE A Level Chemistry 9701 · Halogen compounds
Ethane gas is mixed with chlorine gas in a sealed tube and exposed to ultraviolet light. A mixture of products is obtained, including chloroethane and a compound of formula .
Describe the mechanism of this reaction, and explain how the mixture of products arises.
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.
Describe means: Say what happens or what something is like, in order and with detail. You are not being asked why. If there is data, quote it: name the trend, then give figures with units at the points where it changes.
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