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

How many ions are produced in the solution of the compound $[Co(NH_3)_6]Cl_3$?

The compounds having coordinated water are

$I$. $CrCl_3 \cdot 6 H_2 O$

$II$. $BaCl_2 \cdot 2 H_2 O$

$III$. $CuSO_4 \cdot 5 H_2 O$

One mole of the octahedral complex compound $Co(NH_3)_5Cl_3$ gives $3$ moles of ions on dissolution in water. One mole of the same complex reacts with excess of $AgNO_3$ solution to yield two moles of $AgCl_{(s)}$. The structure of the complex is :

Identify the neutral complex from the following.

Which of the following will not give a white precipitate with silver nitrate $(AgNO_3)$?