(Solved):   (b) UV-Vis spectra of colloidal \( 15 \mathrm{~nm} \) gold nanoparticles is shown in figur ...

 

(b) UV-Vis spectra of colloidal \( 15 \mathrm{~nm} \) gold nanoparticles is shown in figure 2 . Using Beer Lambert law calculates the concentration of gold nanoparticles in cuvette of path length \( 1 \mathrm{~cm} \). (5) Q4. (a) Many materials exist as compound or mixture. Separation of such mixtures into single component and purification of these materials is necessary. Write few chromatographic techniques for purification of materials with basic principle of separation.