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Discuss Briefly Giving an Example in Each Case the Role of Coordination Compounds in - CBSE (Science) Class 12 - Chemistry

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Question

Discuss briefly giving an example in each case the role of coordination compounds in:

(i) biological system

(ii) medicinal chemistry

(iii) analytical chemistry

(iv) extraction/metallurgy of metals

Solution 1

(i) Role of coordination compounds in biological systems:

We know that photosynthesis is made possible by the presence of the chlorophyll pigment. This pigment is a coordination compound of magnesium. In the human biological system, several coordination compounds play important roles. For example, the oxygen-carrier of blood, i.e., haemoglobin, is a coordination compound of iron.

(ii) Role of coordination compounds in medicinal chemistry:

Certain coordination compounds of platinum (for example, cis-platin) are used for inhibiting the growth of tumours.

(iii) Role of coordination compounds in analytical chemistry:

During salt analysis, a number of basic radicals are detected with the help of the colour changes they exhibit with different reagents. These colour changes are a result of the coordination compounds or complexes that the basic radicals form with different ligands.

(iv) Role of coordination compounds in extraction or metallurgy of metals:

The process of extraction of some of the metals from their ores involves the formation of complexes. For example, in aqueous solution, gold combines with cyanide ions to form [Au(CN)2]. From this solution, gold is later extracted by the addition of zinc metal.

Solution 2

Application of coordination compounds.

  • Used in qualitative and quantitative analysis.
  • Determination of hardness of water
  • Extraction of Au and Ag through complex formation
  • Refining of Ni through complex formation
  • Use of Rhodium complex in hydrogenation ofalkene.
  • Use ofEDTA in lead poisoning etc.
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APPEARS IN

 NCERT Solution for Chemistry Textbook for Class 12 (2018 to Current)
Chapter 9: Coordinate Compounds
Q: 27 | Page no. 259

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Solution Discuss Briefly Giving an Example in Each Case the Role of Coordination Compounds in Concept: Introduction of Coordination Compounds.
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