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  4. Which of the following compound CANNOT act as a Lewis base?

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Q. Which of the following compound CANNOT act as a Lewis base?

JEE MainJEE Main 2021Classification of Elements and Periodicity in Properties

Solution:

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.