Question

[Co(H${}_2$O)${}_6$]${}^{3+}$ complex is:

• A. high spin complex
• B. having d${}^2$sp${}^3$-hybridization
• C. low spin complex
• D. having octahedral structure

Answer 1

Answer: (B), (C), (D)

The correct options are
B having d${}^2$sp${}^3$-hybridization
C low spin complex
D having octahedral structure

$\left[Co\right(H_{2}O{)}_6{]}^{3+}$
$Co$ is in $+3$ oxidation state.
$C{o}^{3+}-\left[Ar\right]3d^6$
$H_{2}O$ is a strong field ligand for $C{o}^{3+}$ so it will pair the electrons in 3d orbiitals.
Hence the hybridization involved is $d^{2}s{p}^3$