JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech I Year ENGINEERING CHEMISTRY Previous Question Paper (May - 2018 - R13)
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.
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 corrosion that occurs due to the breakdown of the protective passive film on a metal surface. This often happens in the presence of aggressive anions like chlorides, which penetrate the film at specific weak points or defects, leading to the formation of small, deep pits while the surrounding surface remains relatively 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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