Question

For BF3 molecule which of the following will not be true

• A. It has less bond length than BF4–
• B. It has less bond length than the compound [NH3 BF3]
• C. It's bond strength is increased because of p$\pi$–d$\pi$ back bonding
• D. It forms BF4– when hydrolysed in water.

Answer 1

Answer: (C)

It's bond strength is increased because of p$\pi$–d$\pi$ back bonding

Answer 2

BF3 has p$\pi$–p$\pi$ back bonds