JEE Main 2024 — p Block Elements (Group 13 & 14) Question with Solution

In trivalent state most of the 13th group compounds being covalent are hydrolysed in water. Trichlorides of group 13 on hydrolysis in water form tetrahedral ${\left[\mathrm{M}{\left(\mathrm{OH}\right)}_4\right]}^{-}$ species, the hybridisation state of element $\mathrm{M}$ is ${\mathrm{sp}}^3$.

In case of aluminium, acidified aqueous solution forms octahedral ${\left[\mathrm{Al}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]}^{3+}$ ion, which has an aluminium as a central metal atom and water molecules as ligands. The aluminium is in $+3$  oxidation state and forms$6 {\mathrm{sp}}^3{\mathrm{d}}^2$ hybrid orbitals. 

Hence option D is the answer.