The mismatched combinations are

A. Chlorophyll$–\mathrm{Co}$

B. Water hardness$–\mathrm{EDTA}$

C. Photography$-{\left[\mathrm{Ag}(\mathrm{CN}{)}_2\right]}^{-}$

D. Wilkinson catalyst$-\left[{\left({\mathrm{Ph}}_3\mathrm{P}\right)}_3\mathrm{RhCl}\right]$

E. Chelating ligand$–\mathrm{D}-$Penicillamine

Choose the correct answer from the options given below.

Given below are two statements:
Statement I : The identification of ${\mathrm{Ni}}^{2+}$ is carried out by dimethyl glyoxime in the presence of ${\mathrm{NH}}_4\mathrm{OH}$.

Statement II :The dimethyl glyoxime is a bidentate neutral ligand.

In the light of the above statements, choose the correct answer from the options given below:

To inhibit the growth of tumours, identify the compounds used from the following:

(A) EDTA
(B) Coordination Compounds of $\mathrm{Pt}$
(C) D-Penicillamine
(D) Cis - Platin

Choose the correct answer from the option given below:

Choose the correct answer from the options given below:

Which one doesn't have $\mathrm{\pi }-$bond?