The sum of coordination number and oxidation number of the metal M in the complex [M(en)2(C2O4)]Cl (where en is ethylenediamine) is (AIPMT 2015)

In The complex [M(en)2(C2O4)]Cl Let the oxidation number of M be X. X–(0)2–2=1 X = +3 The coordination number of a metal is defined as the total no of binding sites attached to the metal. Hence, in the given complex coordination number of the element is 6. Sum of Coordination no. and oxidation state = 3 + 6 = 9 Hence, the correct option is (C).