During water purification, four processes are employed: • use of carbon • desalination • chlorination • filtration The aims, W, X, Y and Z, of these processes are given below. W: disinfection X: removal of solids Y: removal of dissolved salts Z: removal of tastes and odours What is the purpose of each process?
- Ause of carbon: Y, desalination: Z, chlorination: W, filtration: X
- Buse of carbon: Z, desalination: Y, chlorination: W, filtration: X
- Cuse of carbon: Z, desalination: Y, chlorination: X, filtration: W
- Duse of carbon: Y, desalination: Z, chlorination: X, filtration: W