B.E.DEGREE EXAMINATIONFIRST YEARENGINEERING CHEMISTRY
Answer all the questions
1.Name any one coagulant used to remove the turbidity of the water?
2.Why should natural water should not be fed to boiler?
3.Why do electrochemical cells stop working after sometime?
4.Why is the salt bridge used in the construction of the cell?
5.What is soft abrasive?Give some examples for synthetic abrasive.
6.Name any four solid lubricants?
7.Solid surfaces are capable of adsorbing solutes from solutions-Explain with example
8.Define Degree of Freedom?
9.Distinguish between gross and net calorific value of fuel
10.What is meant by octane number of a gasoline?
11.a)What is the principle of EDTA titration?Briefly describe the estimation of hardness of water by EDTA method.What is the role of buffer in EDTA titration?
b.)What is the break point chlorination . Write a note on disinfection by chlorine.
12.a)Differentiate between chemical and electro chemical corrosion? Write short notes on special paints?
b.)Bring out the similarities and dissimilarities in electro plating and anodizing techniques.Give explanation of the two.
Explain differential aeration corrosion with example
13.a)What are refactories? What are the prime requsite of a material to be used as refactory related to its porosity?
b.)What are the functions of the filters and plasticizers in plastic industry?
With neat diagram explain injection molding
14.a)Discuss the Langmuirs theory of adsorption and derive expression for mono layer Langmuir adsorption isotherm
b.)Discuss the effect of increasing carbon content in steel .What is meant by annealing of steel?
15.a)Define flue gas.How the analysis of gas is done by Orsat's apparatus?What conclusion can be drawn from the experiment ?What is the significance of the analysis?
b.)Explain briefly the principle in flame photometric analysis and give the block diagram of instrumentation.