MCQ
Which of the following compound $CANNOT$ act as a Lewis base ?
  • A
    $NF _{3}$
  • $PCl _{5}$
  • C
    $SF _{4}$
  • D
    $ClF _{3}$

Answer

Correct option: B.
$PCl _{5}$
b
Lewis base : Chemical species which has capability to donate electron pair.

In $NF _{3}, SF _{4}, ClF _{3}$ central atom (i.e. $\left. N , S , Cl \right)$ having lone pair therefore act as lewis base.

In $PCl _{5}$ central atom $(P)$ does not have lone pair therefore does not act as lewis base.

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