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There are various methods used for the synthesis of Nanoparticles but only the synthesis of Metal nanoparticles using plant extracts is described. Phytoconstituents present in plant extracts responsible for reduction of metal salt solution are mentioned. The characterisation of obtained Metal Nanoparticles are done by using suitable analytical chemistry techniques involving spectroscopy and microscopy studies. Applications of these Metal Nanoparticles like photocatalyst, industrial catalyst, therapeutic uses are highlighted.