Multiple choice

Assertion (A): BF3 is weaker Lewis acid than that of BBr3. Reason (R): BF3 has planar geometry and is stabilized to a greater extent than BBr3 by pπ-back bonding. Select the correct opinion.

  1. A and R are both true and R is the correct explanation of A.

  2. A and R are both false and R is not the correct explanation of A.

  3. A is true but R is false.

  4. Both A and R are false.

  5. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

BF3 is a weaker Lewis acid than BCl3 because of the greater pπ-pπ back bonding effect in BBr3. BF3 and BBr3 both have sp2 hybridisation with trigonal planar geometry.

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