Question

What is the hybridization of $Cr$ if $C{O}_2$ gas is passed into an aqueous chromate (VI) solution?

• A. $s{p}^3$
• B. $d^{3}s$
• C. $s{p}^2$
• D. $ds{p}^2$

Answer 1

The correct option is B $d^{3}s$

$2K_{2}Cr{O}_4+2C{O}_2\to K_{2}C{r}_2{O}_7+2KHC{O}_3$

The $Cr$ atom in $K_{2}C{r}_2{O}_7$ is $d^{3}s$ hybridised and has a tetrahedral geometry.