The hybridisation of atom ' $X$ ' with atomic number 27 in $\left[X \mathrm{~F}_6\right]^{3-}$ is

The hybridisation of atom ' $X$ ' with atomic number 27 in $\left[X \mathrm{~F}_6\right]^{3-}$ is
  1. $d s p^2$
  2. $d^2 s p^3$
  3. $s p^3 d^2$
  4. $s p^3$

Solution

The atomic number of Co is 27 and its valence shell electronic configuration is $3 d^7 4 s^2$.
Hence, $X=$ Co atom and $\left[\left(\mathrm{CoF}_6\right)^{3+}\right]$ complex have $s p^3 d^2$ hybridisation and shape is octahedral.

Asked in: AP EAMCET 2018 (22 Apr Shift 2)

Practice more Chemical Bonding and Molecular Structure questions on Aicharya