Chloroform is stored in dark coloured and sealed bottle.Why?
Chloroform is slowly oxidised by air in the presence of light to an extremely poisonous gas, carbonyl chloride, also known as phosgene. It is therefore stored in closed dark coloured bottles completely filled so that air is kept out.
2CHCl3 + O2 + light gives 2COCl2 + 2HCl
Pg 308 of Class XII NCERT Chemisty book (if you have it lol)
2CHCl3 + O2 + light gives 2COCl2 + 2HCl
Pg 308 of Class XII NCERT Chemisty book (if you have it lol)