Q.Match the compounds given in Column I with suitable items given in Column II. Column I: A) Iodoform B) Carbon tetrachloride C) CFC D) DDT. Column II: 1) Fire extinguisher 2) Insecticide 3) Antiseptic 4) Refrigerants. Code: a) A→2 B→4 C→1 D→3 b) A→3 B→2 C→4 D→1 c) A→1 B→2 C→3 D→4 d) A→3 B→1 C→4 D→2

Several simple polyhalomethanes carry well-known, exam-tested practical uses (and, in most cases, a documented reason they were later restricted). Chloroform (CHCl3): a pharmaceutical solvent and intermediate for pesticides/drugs, formerly a clinical anaesthetic and a preservative for anatomical specimens -- discontinued as an anaesthetic once its slow aerial oxidation to poisonous phosgene (COCl2) was understood. Iodoform (CHI3): an antiseptic for dressing wounds, its action coming from the free iodine it liberates -- largely replaced by other iodine-releasing formulations because of its objectionable smell. Carbon tetrachloride (CCl4): a dry-cleaning agent and a solvent for oils, fats and waxes; because its vapour will not support combustion, it was sold as a …