Q59 / 180 · NEET 2013 (All India) · Chemistry

Which of these is least likely to act as a Lewis base?

  • A
    $\mathrm{CO}$
  • B
    $\mathrm{F}^{-}$
  • Correct answer
    C
    $\mathrm{BF}_3$
  • D
    $\mathrm{PF}_3$

Solution

Electron rich species are called Lewis base. Among the given, $\mathrm{BF}_3$ is an electron deficient species, so have a capacity of electron accepting instead of donating that's why it is least likely to act as a Lewis base. It is a Lewis acid.

Hence, the correct answer is option: 'C'.

Relevant Questions