Question

Select pair of compounds in which both have different hybridization but have same molecular geometry.

• A. $B{F}_3$, $Br{F}_3$
• B. $I{Cl}_2^{-}$, $BeC{l}_2$
• C. $BC{l}_3$, $PC{l}_3$
• D. $PC{l}_3$, $NC{l}_3$

Answer 1

Answer: (B)

$I{Cl}_2^{-}$, $BeC{l}_2$

Both ${ICl}_2^{-}$ and ${BeCl}_2$ are linear but ${ICl}_2^{-}$ has ${sp}^{3}d$ and ${BeCl}_2$ has $sp$ hybridization.

${ICl}_2^{-}$ has $5$ electron pairs in its structure. Hence, its hybridization is ${sp}^{3}d$. But in those $5$ electron pairs $2$ are bond pairs and $3$ are lone pairs, Hence its structure is linear.

As ${BeCl}_2$ has $sp$ hybridization its structure is linear.