Download Original PDF
Get the official Barkatullah University print version scanned document.
🤝 Help Your Juniors!
Have previous year question papers that aren't on our website? Help the next batch of students by sending them to us! With your consent, we will proudly feature your name as a Top Contributor on our platform.
Submit Papers 📩EX-70
B.Tech. 1st Semester (CSE, IT & Electronics)
Examination, 2022-23
Engineering Chemistry
Paper - BE-102
Note :- Attempt all questions. Questions shall be attempted wise at one place.
Write short answer of the following : 2×5=10
(a) Define hardness of water. What are the various units of hardness ?
(b) What is the relationship between gross and net calorific value ?
(c) Why n-Heptane is rated as Zero on the Octane scale ?
(d) Write the dimension of the Jet nozzle of redwood viscometer No II.
(e) What is oiliness ? Why vegetables are stickier than mineral oil.
(a) Calculate the amount of lime and soda required for softening of 1000 lit of water having Ca (HCO₃)₂ = 40.5 ppm, Mg (HCO₃)₂ = 36.5 ppm, CaCl₂ = 34 ppm, NaCl = 10 ppm 10
OR
(b) Write a short note on Slow and filtration.
(a) What do you meant by catalytic cracking ? What are the advantages of catalytic Cracking over thermal cracking. 10
(b) Define carbonization. Explain the changes occur in the physical state of coal during the process of carboniza-tion ? 10
OR
(a) What is refractoriness ? What is the significance of Ther-mal spalling porosity and mechanical strength of a re-fractory ?
(b) What are the various components of paints ? Comments on PVC components of paints. 10
(a) Discuss the salient features of Fischer-Tropsch's process of gasoline manufacture.
(b) A liquid fuel has the following composition by volume H = 14.2%, Carbon = 85.5%, O₂ = 0.3%, if 15% excess of air is used find out the volume of air actually supplied per litre of this fuel. 10
OR
(a) What are co-polymers ? Explain with suitable example.
(b) Draw a neat sketch for rotary kiln mentioning various tem-perature zone of transformation of raw material. 10
(a) Explain the following properties of Lubricants (any two)
(i) Steam Emulsification Number
(ii) Cloud and pour point
(iii) Consistency of grease 5
(b) What are the various factors which affect atmospheric corrosion ? 5
OR
(a) What are the electrochemical series ? Comment on the over-voltage. 7
(b) What is the Limitations of Hydrodynamic lubrication ? Discuss. 3
(a) What is the principle of NMR ? Give block diagram of the instruments.
(b) What is the major threat of nuclear pollution ? 10
OR
(a) Write short Biological Oxygen demand.
(b) What is the major cause of Land pollution ? Summarise as an effective note. 10