JEE MAIN - Chemistry (2021 - 17th March Morning Shift - No. 7)

Which of the following compound CANNOT act as a Lewis base?
SF4
NF3
ClF3
PCl5

Explanation

NF3 has no vacant orbital neither in nitrogen nor in fluorine so it cannot accept the electron & hence cannot acts as lewis acid and but for PCl5 P has no L.P & hence it cannot acts as base but ClF3 (3 B.P + 2 L.P) & SF4 (4 B.P + 1 L.P)

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