What are colloids? Classify the colloids. Differentiate between different types of colloids.
[6 marks]Discuss the kinetic properties of colloids.
[5 marks]Explain different methods of purification of colloids.
[5 marks]1(.a ) Define viscosity. Classify different viscometers with examples. Explain the principle and working of any one single point viscometer.
[6 marks]Discuss shear thinning and shear thickening system of flow with graph.
[5 marks]Define thixotropy. Explain any one method for its determination and give its application in pharmacy.
[5 marks]Discuss in detail the identification tests of emulsions.
[6 marks]Classify suspension with examples. Differentiate between flocculated and deflocculated suspensions.
[5 marks]Define microemulsions and double emulsions. Differentiate between creaming and cracking.
[5 marks]Enumerate methods to determine the particle size. Explain Anderson’s pipette method to determine the particle size with the help of neat diagram.
[6 marks]Explain porosity. Derive its formula. Give its applications in pharmacy.
[5 marks]What is specific surface area? How is it measured by air permeability method?
[5 marks]Define first order reaction with suitable examples. Derive an equation for the determination of rate constant, half life and shelf life for first order reaction kinetics.
[6 marks]Explain chemical degradation of pharmaceutical compounds due to oxidation and hydrolysis. Explain its preventive measures.
[5 marks]Write the objectives, salient features, methodology and limitations of accelerated stability studies.
[5 marks]Define Arrhenius plot and give its significance in calculation of shelf life.
[6 marks]Enumerate different methods of determination of true density and explain any one with neat labelled diagram.
[5 marks]Discuss evaluation parameters of emulsions.
[5 marks]Explain the Newtonian system of flow with examples. What are Bulges and Spurs?
[6 marks]Give reference ranges for angle of repose, carr’s index and hausner’s ratio in context to flow of powders.
[5 marks]Explain the concept of DLVO theory with energy curves. How this theory is applied in stabilizing the colloidal dispersion?
[5 marks]