Mention any four characteristics of Co- Ordination Compound

Mention any four characteristics of Co- Ordination Compound
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Answer :

(1) Hard ness of water is estimated by simple titration with Na2 EDTA.

 (2) Extraction of metals like Ag and Au make use of complex formation .

 (3) Purification of metals by the formation of Co- Ordination compounds

 (4) Biological application like pigment formation photosynthesis, Chloropyll.

 Haemoglobin pigment of blood . 
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