Match List-I with List-II
|
List-I (Name) |
List-II (Use) |
|
(A) Carbon tetrachloride |
(I) Pesticide |
|
(B) DDT |
(II) Solvent |
|
(C) Iodoform |
(III) Refrigerant |
|
(D) Freons-12 |
(IV) Antiseptic |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → (A)-(II), (B)-(I), (C)-(IV), (D)-(III)
Polyhalogen compounds are useful because of properties that come from their halogen atoms: carbon tetrachloride dissolves non-polar substances, DDT is poisonous to insects, iodoform releases iodine and freons are inert gases that liquefy easily.
(A) Carbon tetrachloride — This matches (II) Solvent. \( \ce{CCl4} \) is a non-polar liquid used as a solvent for oils, fats and resins and as a cleaning fluid.
(B) DDT — This matches (I) Pesticide. DDT (p,p′-dichlorodiphenyltrichloroethane) was the first chlorinated organic insecticide, used against the mosquitoes that spread malaria.
(C) Iodoform — This matches (IV) Antiseptic. \( \ce{CHI3} \) was used as an antiseptic because it liberates free iodine, which acts on germs, not because of its own action.
(D) Freons-12 — This matches (III) Refrigerant. Freon-12 is \( \ce{CCl2F2} \), an unreactive, non-toxic gas that liquefies easily, used in refrigerators and air conditioners.
Shortcut: (A)-(II) appears only in Option (2).