Question

Aluminium chloride in acidified aqueous solution gives a complex ion “X”. The hybridization of the central atom in X is:

• A. sp\(^3\)
• B. sp\(^2\)d
• C. d\(^2\)sp\(^3\)
• D. sp\(^3\)d\(^2\)

Hint:

For octahedral complexes (coordination number 6), the hybridization of the central atom is generally sp\(^3\)d\(^2\).

Answer 1

The Correct Option is D

Step 1: Identify the complex formed.
In acidified aqueous solution, Al\(^{3+}\) coordinates six water molecules to give [Al(H\(_2\)O)\(_6\)]\(^{3+}\) with coordination number 6.

Step 2: Assign hybridisation.
Six bonds in an octahedral arrangement require one s + three p + two d orbitals = sp\(^3\)d\(^2\).
\[ \boxed{sp^3d^2} \]