Students W, X, Y and Z each made the statements below about alkanes and alkenes. W: 'Bromine reacts with alkanes by electrophilic substitution.' X: 'Bromine reacts with alkenes by a free-radical addition mechanism.' Y: 'Alkenes can be oxidised by acidified manganate(VII) ions.' Z: 'Alkenes are formed from alkanes by cracking.' Which two students are correct?
- AW and X
- BW and Z
- CX and Y
- DY and Z