The oxoanion which contains all equivalent M- | vedclass

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(C) In $CrO_4^{2-}$ (chromate ion),the central $Cr$ atom is $sp^3$ hybridized,and due to resonance,all four $Cr-O$ bonds are equivalent.In $MnO_4^-$ (

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$I, II$

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(C) In $CrO_4^{2-}$ (chromate ion),the central $Cr$ atom is $sp^3$ hybridized,and due to resonance,all four $Cr-O$ bonds are equivalent.In $MnO_4^-$ (permanganate ion),the central $Mn$ atom is $d^3s$ hybridized,and due to resonance,all four $Mn-O$ bonds are equivalent.In $Cr_2O_7^{2-}$ (dichromate ion),there is a $Cr-O-Cr$ bridge. The terminal $Cr-O$ bonds are not equivalent to the bridging $Cr-O$ bonds.Therefore,only $CrO_4^{2-}$ and $MnO_4^-$ contain equivalent $M-O$ bonds.

The oxoanion which contains all equivalent $M-O$ bonds is:
$(I)$ $CrO_4^{2-}$
$(II)$ $MnO_4^-$
$(III)$ $Cr_2O_7^{2-}$

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The oxoanion which contains all equivalent $M-O$ bonds is:$(I)$ $CrO_4^{2-}$$(II)$ $MnO_4^-$$(III)$ $Cr_2O_7^{2-}$