Identify neutral complex from following.

Step-by-step solution

Identifying a neutral complex requires calculating the total charge of each coordination entity. The overall charge is the sum of the central metal's oxidation state and the charges from all ligands. For tetracyanonickelate(II) ion, the nickel center is Ni 2+ and four CN – ligands contribute –4, yielding a –2 charge: +2 + 4 (-1) = -2 , an anion. Sodium hexafluoroaluminate(III) contains the complex ion [AlF 6 ] 3– , as aluminum is +3 and six F – ligands contribute –6: +3 + 6 (-1) = -3 , an anion. Triamminetrinitroco