Assignment-4

Assignment-4

1. What is Lambert’s Law?
2. What is Lambert-Beer Law?
3. Define absorbance and transmittance of a solution.
4. Describe briefly the process which takes place when the solution of a metallic salt is sprayed into a flame?
5. Name the important components of a flame –photometer.
6. Write short notes on the following:
(i) Oileness (ii) Neutralization number (iii) Saponification number
(iv) Cloud point and pour point of lubricant.(iv) Synthetic lubricants
7. Define Viscosity Index. How is it determined for a lubricant?
8. Why graphite and MoS2 preffered as solid lubricants?
9. What do you understand by wear ? Give precise definition.
10. What is friction and what are its consequences?
11. Give a brief account of the classical laws of frictions
12. Give the Principle and Applications of I.R.& U.V. spectroscopy.










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