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# Which of the following statement is not correct ?

$\begin {array} {1 1} (A)\;\text{Boron$BF_3$involves$sp^2$hybridization} \\ (B)\;\text{$BF_3$acts as a Lewis acid} \\ (C)\;\text{$BF_3$is a volatile liquid} \\ (D)\;\text{forms an adduct with$NH_3$} \end {array}$

Answer : $BF_3$ is a volatile liquid
$BF_3$ is a gaseous substance.