JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech I Year ENGINEERING CHEMISTRY Previous Question Paper (May - 2018 - R13)
Note: This question paper contains two parts A and B. Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit. Each question carries 10 marks and may have a, b, c as sub questions.
Part A
Write the cell notation for Calomel Electrode.
Answer
The cell notation for a calomel electrode is: Hg | Hg2Cl2(s) | Cl-(aq)
What is the reason for pitting corrosion to occur?
Answer
Pitting corrosion is a localized form of attack that occurs due to the breakdown of the protective passive film on a metal surface at specific points. This is often triggered by the presence of aggressive anions like chlorides (Cl-) in the environment, leading to the formation of small, deep pits while the rest of the surface remains unaffected.
What are the drawbacks of natural rubber?
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Differentiate Plastic and Resin.
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What is caustic embrittlement? Write the one preventive method for it.
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What are the disadvantages of Zeolite process?
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Define HCV and LCV and write their inter relationship.
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Write composition and uses of LPG and CNG.
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Give the principle of Electrophoreses.
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Mention applications of colloids in industry.
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Part B
Explain determination of pH by using Calomel electrode.
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What is a fuel cell? Describe construction and working principle of Hydrogen-Oxygen fuel cell.
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Describe mechanism of electrochemical corrosion by taking Rusting of Iron as an example.
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Write a note on sacrificial anodic method.
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Differentiate between addition and condensation polymerization.
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Give preparation, properties and engineering applications of (i) Nylon:6 (ii) Dacron (iii) Bakelite.
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What are conducting polymers write the classification and applications.
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Give the applications of Nano materials.
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Explain Ion exchange process for the softening of water.
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3.50 ml of a sample water consumed 15 ml of 0.01 EDTA before boiling and 5 ml of the same EDTA after boiling. Calculate the degree of hardness, permanent hardness and temporary hardness.
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Write about Boiler corrosion.
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Describe various steps involved in domestic water treatment.
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Outline the schematic procedure for synthesis of petrol by Bergius process.
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Mention the criteria for selecting a good fuel.
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Explain Ultimate analysis of coal and give its significance.
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What is cracking? Describe fixed bed catalytic cracking process with a neat diagram.
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Explain about phase diagram of lead –silver system?
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Write about: (i) Advantages and limitations of phase rule. (ii) Application of Pb-Ag system in Pattison’s process.
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Describe hardening, annealing and normalization.
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Write a note on Electrical and Optical properties of colloids.
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