Documents Deptt. Of Applied Sciences Govt. Polytechnic College For Girls Patiala Presented By- Dr.Raman Rani.....

Slide 1Deptt. Of Applied Sciences Govt. Polytechnic College For Girls Patiala Presented By- Dr.Raman Rani Mittal M.Sc.,M.Phil.,Ph.D. (Chemistry) 1 Slide 2 2 Slide 3 Natural…