Match the following lists The correct answer is $A \quad B \quad C \quad D$

Match the following lists
The correct answer is $A \quad B \quad C \quad D$
  1. 4 3 2 1
  2. 3 2 1 4
  3. 2 4 5 3
  4. 5 1 4 3

Solution

Correct matching is Benzene $-(4 n+2) \pi$ electrons Ethylene - Mustard gas Acetaldehyde - Silver mirror Chloroform - Phosgene Benzene has $6 \pi$ electrons, i.e., it follows Huckel rule $(4 n+2) \pi$ electrons. Ethylene reacts with $\mathrm{S}_2 \mathrm{Cl}_2$ to give mustard gas (war gas). Acetaldehyde gives positive silver mirror test with Tollen's reagent and chloroform on oxidation gives phosgene (poisonous gas).

Asked in: AP EAMCET 2005

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