Which of the following statements are true?

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(A) $1$. $PH_5, NCl_5$ and $OF_6$ do not exist because $P$ cannot expand its octet to $5$ bonds due to steric hindrance,$N$ lacks $d$-orbitals to form

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$PH_5, NCl_5$ and $OF_6$ do not exist

Vedclass · Answer

(A) $1$. $PH_5, NCl_5$ and $OF_6$ do not exist because $P$ cannot expand its octet to $5$ bonds due to steric hindrance,$N$ lacks $d$-orbitals to form $5$ bonds,and $O$ cannot form $6$ bonds due to its small size and lack of $d$-orbitals. Thus,this statement is true.$2$. $I_3^{-}$ has a linear geometry ($sp^3d$ hybridization with $3$ lone pairs on the central $I$ atom). Thus,this statement is false.$3$. $XeF_4$ has a square planar geometry,which is symmetric,making it non-polar. Thus,this statement is false.$4$. The bond order of $O_2$ is $2.0$ and the bond order of $O_2^{2-}$ (peroxide ion) is $1.0$. Thus,this statement is false.

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