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JEE Main levelOne or more correct optionsDifficulty 2 of 3o4265

The halide shown is used in the reactions below. Select all correct statements.

  1. AWith potassium tert-butoxide in tert-butanol the major product is cyclohexene.
  2. BWith sodium azide in DMF the major product is the substitution product azidocyclohexane.
  3. CThe halide has four beta-hydrogens.
  4. DThe alkene from E2 of the halide exists as E and Z isomers.

Answer: A, B, C

The compound is bromocyclohexane. A strong bulky base gives E2 and cyclohexene, while azide is a good nucleophile but a weak base, so SN2 predominates. The two ring carbons next to C-Br carry 2 H each (4 beta-hydrogens). Cyclohexene has a ring double bond with no E/Z isomerism, so the last statement is false.
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