Question

$Li\left[Al{H}_4\right]$ is used as a reducing agent in many reaction & it is prepared by excess $LiH$ and $AlC{l}_3$. Select incorrect statement about $Li\left[Al{H}_4\right]$.

• A. hybridisation of $Al$ is same as $B$ in $Na\left[B{H}_4\right]$
• B. geometry of around $Al$ is same as $AlC{l}_4^{\Theta }$
• C. $Al{H}_4^{\Theta }$, $B{H}_4^{\Theta }$, $AlC{l}_4^{\Theta }$ are iso-structral
• D. $Al{H}_4^{\Theta }$, $AlC{l}_4^{\Theta }$ $B{H}_4^{\Theta }$ are iso electronic

Answer 1

The correct option is D $Al{H}_4^{\Theta }$, $AlC{l}_4^{\Theta }$ $B{H}_4^{\Theta }$ are iso electronic

$Al{H}_4^{-}$have different number of electrons since $Al$ has the same charge in both of them whereas the second element is different in both.