A sample of chloroform before using it as an anaesthetic is tested by
Tollen's reagent
Ammonical solution of cuprous chloride
Aq.silver nitrate solution
Silver nitrate solution, after boiling with alcoholic KOH
CHCl3+O2→COCl2+HCl
HCl+AgNO3→AgCl(white ppt)+HNO3
A sample of chloroform before being used as an anaesthetic agent is tested by