What happens when — (write chemical equation only):
i) Phenol reacts with Br$_2$ water?
ii) Acetylation of phenol happens in the presence of pyridine?
iii) Phenol is heated with PCl$_5$?
iv) Phenol reacts with NaOH?
v) Vapour of the mixture of phenol and methyl alcohol is passed through hot thoria (ThO$_2$)?