Chloropicrin is obtained by the reaction of
steam on carbon tetrachloride
nitric acid on chlorobenzene
chlorine on picric acid
nitric acid on chloroform.
When chloroform is treated with concentrated nitric acid, its hydrogen is replaced by nitro group. CHCl3+HONO2→CNO2Cl3chloropicrin+H2O
___% nitric acid is obtained by distilling 68% nitric acid with Conc.H2SO4.