The coordination number of $Cu$ in the complex $[Cu(H_2O)_4]^{2+}$ is:

What is the coordination number of the central metal ion in the $[Co(en)_3]^{3+}$ complex?

What is the coordination number of the metal in $[Co(en)_2Cl_2]$?

Potassium cyanide is made alkaline with $NaOH$ and boiled with thiosulphate ions. The solution is cooled and acidified with $HCl$ and this solution with iron $(III)$ chloride produces :-

Which of the following ligands can form a chelate?

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 $108$].