GTU previous year question papers Chemistry

GTU previous years question papers

GUJARAT TECHNOLOGICAL UNIVERSITY

   BE SEM- I / II Winter Examination-Dec.-2011

             Subject code: 110001               

             Subject Name: Chemistry

Instructions:

1. Attempt any five questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1 (a) What is meant by softening of water? With a neat schematic diagram, describe
cold lime soda process.
(b) What are the characteristic of a good fuel? Explain any one method of analysis.
Q2 (a) Define the desalination of brackish water and Explain method of electro dialysis.
(b) Calculate the temporary and total Hardness of water sample containing

following data in mg/L.

Mg(HCO3)2 =73;Ca(HCO3)2=162; MgCl2= 95;CaSO4=136 Given: molecular weight of. Mg (HCO3)= 146; Ca (HCO3)2 = 162; MgCh = 95; CaSO4=136.

Q.3 (a) Describe with the help of a neat diagram of rotary kiln for the manufacture of Portland cement by wet process.

(b) Discuss the classification of polymers.

Q.4 (a) What are the constituents of Portland cement? Discuss the mechanism of setting  and hardening of Portland cement.

(b) Explain the types of polymerization giving suitable examples.

Q.5 (a) Explain the mechanism of electrochemical corrosion.

(b) What is galvanic corrosion? Explain its mechanism.

Q.6 (a) Define heat treatment and explain the following methods.    (i) Annealing; (ii) Hardening.

(b) Define the term lubricant. Explain the following properties of lubricants and  their significance.

(i)Viscosity; (ii) Flash point.

Q.7 (a) Describe the process of melt spinning and wet spinning of fibers.

(b) Explain the manufacture of ethyl alcohol by fermentation.

 

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