In which of the following molecules/ions BF_3 | vedclass

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(C) For $sp^2$ hybridization,the steric number should be $3$.In $BF_3$ molecule,the central atom $B$ is bonded to $3$ atoms and has $0$ lone pairs,so

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$BF_3$ and $NO_2^-$

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(C) For $sp^2$ hybridization,the steric number should be $3$.In $BF_3$ molecule,the central atom $B$ is bonded to $3$ atoms and has $0$ lone pairs,so steric number $= 3 + 0 = 3$. Hence,it is $sp^2$ hybridized.In $NO_2^-$ ion,the central atom $N$ is bonded to $2$ oxygen atoms and has $1$ lone pair,so steric number $= 2 + 1 = 3$. Hence,it is $sp^2$ hybridized.In $NH_2^-$ ion,the central atom $N$ is bonded to $2$ hydrogen atoms and has $2$ lone pairs,so steric number $= 2 + 2 = 4$. Hence,it is $sp^3$ hybridized.In $H_2O$ molecule,the central atom $O$ is bonded to $2$ hydrogen atoms and has $2$ lone pairs,so steric number $= 2 + 2 = 4$. Hence,it is $sp^3$ hybridized.Thus,in $BF_3$ and $NO_2^-$,the central atom is $sp^2$ hybridised.

In which of the following molecules/ions $BF_3$,$NO_2^-$,$NH_2^-$ and $H_2O$,the central atom is $sp^2$ hybridised?

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