(i)By adding small amount of pyridine and copper sulphate.
(ii) In human body methanol is oxidized to methanoic acid $(HCOOH)$ which is highly toxic
(iii) Methanol is manufactured by catalytic hydrogenation of carbon monoxide.
$CO +2H_2 \longrightarrow CH_3$
* Methanol is used in the manufacture of formaldehyde.
* It is also used as denaturant for ethyl alcohol.
* It is also used as solvent.