Which of the following does not react with $AgCl$?

Identify the highest field strength ligand from the following.

Which among the following cations will form the lowest stability complex if the ligand remains the same?

Which of the following ions forms a complex with a coordination number of $2$ in the presence of excess $CN^{-}$?

The overall complex dissociation equilibrium constant for the complex $[Cu(NH_3)_4]^{2+}$ ion will be (given $\beta_4$ for this complex is $2.1 \times 10^{13}$,where $\beta_4$ is the association constant).

Ammonia is a Lewis base. It forms complexes with cations. Which one of the following cations does not form a complex with ammonia?