Chemistry · Oct / Nov 2020 · Paper 12 · Question 33

Four processes are used during the purification of water. ● use of carbon ● desalination ● chlorination ● filtration The purposes, W, X, Y and Z, for these processes are listed. W disinfection X removal of solids Y removal of dissolved salts Z removal of tastes and odours What is the purpose for each process?

1. Ause of carbon Y; desalination Z; chlorination W; filtration X
2. Buse of carbon Z; desalination Y; chlorination W; filtration X
3. Cuse of carbon Z; desalination Y; chlorination X; filtration W
4. Duse of carbon Y; desalination Z; chlorination X; filtration W

As printed in the paper