The oxidation state and covalency of $Al$ in $[AlCl(H_2O)_5]^{2+}$ are respectively

$NH_2-NH_2$ acts as a .......

$A$ complex has a composition corresponding to the formula $CoBr_2Cl \cdot 4NH_3$. What is the structural formula if conductance measurements show two ions per formula unit? Silver nitrate solution gives an immediate precipitate of $AgCl$ but no $AgBr$.

The valency of the cuprammonium ion is

What is the number of moles of ionisable $Cl^{-}$ ions in a coordination complex if it forms $2 \ moles$ of $AgCl$ when treated with silver nitrate solution in excess?

Identify the neutral ligand from the following.