The coordination number of a metal in coordination compounds is

Identify the anionic sphere complex from the following.

The colour of $(NH_4)_2SO_4 \cdot Fe_2(SO_4)_3 \cdot 24H_2O$ is

Identify the neutral complex from the following.

Which of the following acts as a bidentate ligand in complex formation?

The volume (in $mL$) of $0.1 \, M \, AgNO_3$ required for complete precipitation of chloride ions present in $20 \, mL$ of $0.01 \, M$ solution of $[Cr(H_2O)_5Cl]Cl_2$ as silver chloride is $..........$.