What is the coordination number of $Co$ in the complex $[CoF_6]^{3-}$?

Which of the following complexes gives only $25\%$ mole of $AgCl$ precipitate when reacted with excess $AgNO_3$?

Are the oxidation state and covalency of $Al$ in $[AlCl(H_{2}O)_{5}]^{2+}$ same?

Excess of silver nitrate solution is added to $100 \ mL$ of $0.01 \ M$ pentaaqua chloro chromium $(III)$ chloride solution. The mass of silver chloride obtained in grams is [Atomic mass of silver is $108$].

Which among the following is $NOT$ a neutral ligand?

According to Lewis,the ligands are