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JEE Main · 2011 · 10 Apr 2011 · Offline · Hydrocarbons

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Ozonolysis of an organic compound gives formaldehyde as one of the products. This confirms the presence of :
  1. (A)a vinyl group✓ Correct
  2. (B)an isopropyl group
  3. (C)an acetylenic triple bond
  4. (D)two ethylenic double bonds

Answer: (A)

Solution

Ozonolysis cleaves a carbon-carbon double bond and caps each end with oxygen to give carbonyl compounds. Formaldehyde, , can only come from a terminal , that is from a vinyl group at the end of the double bond, so obtaining formaldehyde on ozonolysis confirms the presence of a vinyl group.

JEE Main · 2011 · 10 Apr 2011 · Offline · Single correct option

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