Pick out the incorrect\ (I) The dichromate anion contains two tetraheda joined through oxygen\ (II

Question

Pick out the incorrect\ (I) The dichromate anion contains two tetraheda joined through oxygen\ (II) In $\mathrm{Cr}_{2} \mathrm{O}_{7}^{2-}$, all the Cr-O bonds have the same bond length\ (III) The shape of $\mathrm{Cr}_{2} \mathrm{O}_{7}^{2-}$ is tetragonal\

Professor PC Thomas Classes · Answer

Dichromate anion has two tetrahedra joined through oxygen In dichromate anion there are two types $\mathrm{Cr}-\mathrm{O}$ bonds with dif. lengths.