Chemistry - Jan 2014
First Year Engineering (Semester 1)
TOTAL MARKS: 100
TOTAL TIME: 3 HOURS (1) Question 1 is compulsory.
(2) Attempt any four from the remaining questions.
(3) Assume data wherever required.
(4) Figures to the right indicate full marks. 1 (a) Explain break point chlorination.(4 marks) 1 (b) Explain temporary & permanent hardness. (4 marks) 1 (c) Discuss ion exchange method of softening water along with chemical reactions involve in it. (6 marks) 2 (a) Explain briefly Annealing & Hardning.(4 marks) 2 (b) Explain calcination.(4 marks) 2 (c) Explain principle, instrumentation & working of IR spectroscopy.(6 marks) 3 (a) Discuss Galvanic corrosion &Pitting corrosion(4 marks) 3 (b) What is Pilling Bedworth rule? What is cathodic protection?(4 marks) 3 (c) Write a note on Electrochemical corrosion in acidic medium &neutral medium. (6 marks) 4 (a) Give characteristics of a good fuel(4 marks) 4 (b) What is CNG? Why CNG is preferred over LPG?(4 marks) 4 (c) Explain Thick-film lubrication & Extreme Pressure lubrication.(6 marks) 5 (a) Give differences between Thermosetting & Thermoplastic polymers.(4 marks) 5 (b) Discuss preparation , properties & uses of PVC.(4 marks) 5 (c) Explain with examples Addition & Condensation polymerization.(6 marks) 6 (a) Give an account of acid rain. What is Photochemicalsmog?(4 marks) 6 (b) Give characteristics of a good fibre.(4 marks) 6 (c) Write a detailed note on manufacture of ethyl alcohol from molasses by fermentation.(6 marks) 7 (a) Justify "solar energy is the ultimate source of all types of energy"(6 marks) 7 (b) What is a paint? Expalin different constituents of paint.(6 marks) 7 (c) What is sand blasting?(2 marks)