Match column I withColumn II for the oxidation states of the central atoms {:(,"Column I","Column II"), ((i),Cr_(2)O(7)^(2-),(a)+3), ((ii),MnO_(4)^(-),(b)+4),((iii),VO_(3)^(-),(c)+5),((iv),FeF_(6)^(3-),(d)+6),(,,(e)+7):}

Match column I withColumn II for the oxidation states of the central a

1.	Match column I withColumn II for the oxidation states of the central atoms {:(,"Column I","Column II"), ((i),Cr_(2)O(7)^(2-),(a)+3), ((ii),MnO_(4)^(-),(b)+4),((iii),VO_(3)^(-),(c)+5),((iv),FeF_(6)^(3-),(d)+6),(,,(e)+7):}
Answer» Solution :(i) O.N of Cr in `Cr_(2)O__(7)^(21-)=+6` (ii) O.N Of Mn `MnO_(4)^(-)=+7` (iii) O.N of V in `O_(3)^(-)=x+3(-2)=-1 or x=+5` (IV) O.N of F in `FeF_(6)^(3-)=x+6(-1)=-3 or x=+3` THUS correct matching is `(i) rarr(d),(ii)rarr(e ),(iii)rarr(c ),(iv)rarr(a)`