Select the correct statement(s) about ${\mathrm{Cr}}_2{\mathrm{O}}_7^{2-}$and  ${\mathrm{CrO}}_4^{2-}$

 

For the compounds, the relative reaction can be given as,

$2{{\mathrm{CrO}}_4}^{2-}+2{\mathrm{H}}^{+}\to {\mathrm{Cr}}_2{{\mathrm{O}}_7}^{2-}+{\mathrm{H}}_2\mathrm{O}$

The structures can be given as,

Here, the bond length of y is greater than the x.