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Engineering Chemistry - I

(New) (101102)P. Pages : 3

Time : Three Hours Max. Marks : 80

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Instructions to Candidates :1. Do not write anything on question paper except Seat No.2. Graph or diagram should be drawn with the black ink pen being

used for writing paper or black HB pencil.3. Students should note, no supplement will be provided.4. Attempt any two sub-questions from each unit.5. Diagrams should be drawn wherever necessary.6. Use of non-programmable calculator are allowed.7. Figures to the right indicate full marks.

UNIT - I

1. a) Calculate the amount of lime 70% pure and soda 85% pure for thetreatment of 25000 litres of water. The analysis of this gives theresults;

ppm20.38HCOMg 23 , ppm50.25Cacl2

,ppm00.40HCOCa 23 ppm00.35CaSO4

ppm00.40MgSO4 , ppm18NaCl

8

b) i) Explain alkalinity process with any one case. 4

ii) Write a note on caustic embrittlement. 4

c) i) Explain Mohr's method for determination of chloride content. 4

ii) Describe reverse osmosis method with the help of suitablediagram.

4

*3455*Seat Number

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UNIT - II

2. a) Define polymer. Explain different constituents of plastics with theirfunctions.

8

b) i) Give preparation, properties and uses of polycarbonate. 4

ii) Give the drawbacks of natural rubber. 4

c) i) Different iate between thermosoftening and thermosettingplastics.

4

ii) Give the preparation, properties and uses of butyl rubber. 4

UNIT - III

3. a) Explain the manufacture of Portland cement by dry process withthe help of flow sheet diagram.

8

b) i) Describe the chemical constituents of Portland cement. 4

ii) Write a note on setting and Hardening of Portland cement. 4

c) i) Explain classification of cement with their properties. 4

ii) Describe the process of heat of hydration. 4

UNIT - IV

4. a) Explain electrical properties of ceramics. 8

b) i) Draw the flowsheet diagram of manufacturing of ceramics. 4

ii) Explain drying of ceramic wares. 4

c) i) What will be the effect of heat on shrinkage and porosity ofceramic wares.

4

ii) Write the applications of ceramics. 4

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UNIT - V

5. a) Define alloy. Explain purposes of making alloy with one exampleeach.

8

b) i) Give the classification of alloy. 4

ii) Explain preparation of alloy by fusion method. 4

c) i) Give the composition, properties and uses of Duralumine. 4

ii) Explain the composition, properties and uses of Gun metal. 4

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