Question

Match the compounds in Column-I with the properties/uses/effects given in Column-II. \[ \begin{array}{llll} (a) & \text{Chloroform} & (p) & \text{Soluble in fat} \\[6pt] (b) & \text{DDT} & (q) & \text{Antiseptic} \\[6pt] (c) & \text{Freon} & (r) & \text{Oxidation to phosgene} \\[6pt] (d) & \text{Iodoform} & (s) & \text{Depletion of stratospheric } O_3 \text{ layer} \end{array} \]

• A. \((a)-(q),\ (b)-(s),\ (c)-(p),\ (d)-(r)\)
• B. \((a)-(r),\ (b)-(p),\ (c)-(s),\ (d)-(q)\)
• C. \((a)-(s),\ (b)-(q),\ (c)-(r),\ (d)-(p)\)
• D. \((a)-(r),\ (b)-(p),\ (c)-(q),\ (d)-(s)\)

Hint:

\[ \begin{aligned} \text{Chloroform} &: \text{Oxidation to phosgene} \\ \text{DDT} &: \text{Fat-soluble pesticide} \\ \text{Freon} &: \text{Ozone layer depletion} \\ \text{Iodoform} &: \text{Antiseptic} \end{aligned} \]

Answer 1

The Correct Option is B

Concept: Haloalkanes and haloarenes possess characteristic properties and applications based on their chemical behaviour.

Step 1: Match the compounds with their known properties and uses. Chloroform gets oxidized in the presence of air and sunlight to form poisonous phosgene. \[ (a)\rightarrow(r) \] DDT is a fat-soluble insecticide and undergoes biomagnification. \[ (b)\rightarrow(p) \]

Step 2: Match the remaining compounds. Freons are responsible for depletion of the stratospheric ozone layer. \[ (c)\rightarrow(s) \] Iodoform is used as an antiseptic because it slowly liberates iodine. \[ (d)\rightarrow(q) \] \[ \begin{aligned} \text{Chloroform} &: \text{Oxidation to phosgene} \\ \text{DDT} &: \text{Soluble in fat} \\ \text{Freon} &: \text{Depletion of stratospheric } O_3 \text{ layer} \\ \text{Iodoform} &: \text{Antiseptic} \end{aligned} \] Therefore, \[ (a-r),\quad (b-p),\quad (c-s),\quad (d-q) \] \[ \boxed{(a-r),\quad (b-p),\quad (c-s),\quad (d-q)} \] Hence, option \(\mathbf{(B)}\) is correct.