When $CuSO_4$ solution is added to $K_4[Fe(CN)_6]$,the formula of the product formed is

Chlorophyll contains

The complex $[Cu(H_2O)_4]^{2+}$ absorbs light in the yellow region. What color will it emit as its complementary color?

$A$ white precipitate of $AgCl$ dissolves in excess of
$(I)$ $NH_{3(aq)}$
$(II)$ $Na_2S_2O_3$
$(III)$ $NaCN$

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:

Iron salt used in blue prints is: