Assertion: In `Cr_2O_7^(2-)` ion, all the `Cr-O` bond lengths are equal.
Reason: In `Cr_2O_7^(2-)` ion all the `O-Cr-O` bond angles are equal.

Assertion : In Cr_2O_7^(2-) ion, all the Cr-O bond lengths are equal. . Reason : In Cr_2 O_7^(2-) ion, all the O-Cr-O bond angles are equal. a)If both (A) and (R) are correct and (R) is the correct explanation of(A). b)If both (A) and (R) are correct, but(R) is not the correct explanation of (A). c)If(A) is correct, but (R) is incorrect. d)If both (A) and (R) are incorrect.

In Cr_(2)O_(7)^(2-) :

In Cr_2O_7^(2-) all Cr-O bonds are equivalent.

Account for the following : In CrO_(4)^(2-) ion , all the Cr-O bond length are equal

True of False : In Cr_2O_7^(2-) , all Cr-O bonds are equivalent.

At pH = 11 , Cr_2O_7^(2-) ion changes to