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JEE Advanced levelOne or more correct optionsDifficulty 3 of 3nm153

Select the correct statements about monochloro derivatives (constitutional isomers only, no stereoisomers) and formulas.

  1. Aspiro[3.3]heptane has the molecular formula
  2. Bbicyclo[2.2.1]heptane gives 4 monochloro derivatives
  3. Cbicyclo[2.2.1]heptane gives 3 monochloro derivatives
  4. Dspiro[3.3]heptane gives 2 monochloro derivatives

Answer: C, D

Norbornane has three carbon types: bridgeheads C-1/C-4, the four equivalent C-2/3/5/6 (exo/endo are stereo), and C-7, so 3. Spiro[3.3]heptane has C-1/3/5/7 (next to spiro) and C-2/6 (distal), and the spiro carbon has no H, so 2. Spiro[3.3]heptane has two rings: , not .
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