The complex $[Co(NH_3)_5Br]SO_4$ will give a white precipitate with:

When potassium ferrocyanide crystals are heated with concentrated $H_2SO_4$,which of the following gases is evolved?

$EDTA$ is used in the estimation of

$CO$ can be absorbed by

In a complexometric titration of a metal ion with a ligand,the reaction is $M$ $(Metal-ion)$ + $L$ $(Ligand)$ $\to$ $C$ $(Complex)$. The end point is estimated spectrophotometrically (through light absorption). If '$M$' and '$C$' do not absorb light and only '$L$' absorbs,then the titration plot between absorbed light $(A)$ versus the volume of ligand '$L$' $(V)$ would look like:

State the importance of coordination compounds in:
$1$. Industrial processes
$2$. Biological systems