A sample of chloroform before being used as an anaesthetic agent is tested by

Question

A sample of chloroform before being used as an anaesthetic agent is tested by (A) Fehling's solution (B) ammoniacal cuprous chloride (C) silver nitrate solution in the cold (D) silver nitrate solution after boiling with alcoholic KOH.

Tardigrade Admin · Accepted Answer

Chloroform is tested before use, for the presence of extremely poisonous gas phosgene, that may be formed on storage. If CHCl 3 sample contains phosgene ( COCl 2) then it will give a white ppt. when treated with AgNO 3 solution in the cold.

Q. A sample of chloroform before being used as an anaesthetic agent is tested by

Fehling's solution

ammoniacal cuprous chloride

silver nitrate solution in the cold

silver nitrate solution after boiling with alcoholic $K O H$ .

Chloroform is tested before use, for the presence of extremely poisonous gas phosgene, that may be formed on storage. If $C H C l_{3}$ sample contains phosgene $(COC l_{2})$ then it will give a white ppt. when treated with $A g N O_{3}$ solution in the cold.