Statement I: BF3 is weaker Lewis acid than BCl3.Statement II: The planar BF3 molecule is stabilised to a greater extent than BCl3 by B -X backbonding.
Both statements I and II are correct.
Statement I is correct and statement II is incorrect.
Statement I is incorrect and statement II is correct.
Both statements I and II are incorrect.
BF3 is weaker Lewis acid than BCl3 due to pπ-pπ back bonding.