$A$ metal complex absorbed orange light. The colour in which it appears is

Which of the following hydroxides is soluble in ammonia?

The addition of potassium ferrocyanide to a ferric salt gives a Prussian blue color,which is primarily due to the formation of .........

To inhibit the growth of tumours,identify the compounds used from the following:
$(A)$ $EDTA$
$(B)$ Coordination Compounds of $Pt$
$(C)$ $D$-Penicillamine
$(D)$ $Cis-Platin$
Choose the correct answer from the option given below:

What metal is present in Wilkinson's catalyst,which is used as a homogeneous catalyst for the hydrogenation of alkenes?

Extraction of $Ag$ from sulphide ore and removal of unreacted silver from photographic plate involve complexes are respectively