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JEE Main levelSingle correct optionDifficulty 2 of 3o2022

Assertion (A): Addition of to cyclohexene gives trans-1,2-dibromocyclohexane. Reason (R): is non-polar and is polarised by the electrons of the alkene.

  1. ABoth A and R are true and R is the correct explanation of A
  2. BBoth A and R are true but R is not the correct explanation of A
  3. CA is true but R is false
  4. DA is false but R is true

Answer: B

A is true: anti addition through a bromonium ion gives the trans product. R is also true: the bond polarises and starts the electrophilic attack. But the trans stereochemistry is explained by backside opening of the cyclic bromonium ion, not by the polarisation. So R is true but not the explanation.
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