Solved question paper for CHEMISTRY May-2015 (B-TECH 1st-2nd)
Solved Question Paper
Engineering chemistry May-2015
PTU • B-TECH • Electrical Engineering • 1st-2nd • May-2015
engineering chemistry previous year question papers on BRpaper are organized for students of Punjab Technical University’s Bachelor of Technology program, 1st-2nd semester. This section makes it easier to browse subject-wise old question papers for engineering chemistry, so students can review how questions are typically framed in past exams and get a sense of the exam pattern. Many students search for engineering chemistry previous year question paper while preparing for exams, and this page is built to support exactly that kind of subject-wise browsing and revision. BRpaper is not the official website of Punjab Technical University or any institution, and it does not publish official notices or academic updates.
PART A
1. Spectroscopy and its Applications:
An introduction UV/Visible Spectroscopy: Selection rules; Line widths and intensity of spectral lines; Principle and instrumentation; Electronic Transitions; Chromophores & auxochromes; Factors affecting λMax & intensity of spectral lines; Franck-Condon principle; Applications. IR Spectroscopy: Principle and instrumentation; Vibrational frequency; Fundamental modes of vibrations and types; Anharmonics; Factors affecting vibrational frequency; Applications. NMR Spectroscopy: Principle & instrumentation; Chemical shift; Spin-Spin Splitting; High-resolution NMR spectrum (PMR only). (7)
2. Photochemistry:
Introduction; Photo-physical & photochemical processes; Light sources in photochemistry; Beer-Lambert Law; Laws of Photochemistry; Quantum yield (primary and overall); Primary and secondary photochemical reactions; Jablonski diagram; Semiconductor photochemistry, Photovoltaic cells, Introduction to optical sensors, Introduction to supra-molecular photochemistry. (5)
3. Water and its Treatment:
Boiler feed water: Specification, Scales and sludge fermentation; Priming & foaming; Different methods of the water purifications and softening; Desalination of water; Water for domestic use: Specification; Disinfection of water.
4. Green Chemistry and its Applications:
Introductory overview - Definition and concepts of Green chemistry; Emergence of Green chemistry; Twelve principles of Green Chemistry with emphasis on the use of alternative feedstock (biofuels); Use of innocuous reagents in natural processes; Alternative solvents; Design of the safer chemicals; Designing alternative reaction methodology. Microwave and ultrasonic radiation in Green synthesis - Minimizing energy consumption. (4)
PART B
5. Corrosion and its Prevention:
Introduction; Different types of corrosion - Wet and Dry corrosion; Different types of surface films; Mechanisms of wet corrosion; Galvanic corrosion; Galvanic Series; Concentration cell corrosion and differential aeration corrosion; Soil and microbial corrosions; waterline, stress corrosions; Various methods of corrosion control. (5)
6. Polymers and Reinforced Composites:
Introduction; Functionality; Types of polymerization; Specific features of polymers; Structures - regularity and irregularity; Tacticity of polymers; Average molecular weights and size; Determination of molecular weight by number average method; Effect of molecular weight on the properties of polymers; Introduction to polymer reinforced composite. (5)
7. Nanochemistry:
Introduction; Materials self-assembly; Molecular vs. materials self-assembly; Self-assembling materials; Two-dimensional assemblies; Mesoscale self-assembly; Coercing colloids; Nanocrystals; Supramolecular structures; Nanoscale materials; Future perspectives. (5)
8. Petrochemicals:
Introduction; First, second & third generation petrochemicals; Primary Raw Materials for Petrochemicals. Natural gas: Natural gas treatment processes; Natural gas liquids; Properties of natural gas; Crude oil: Composition of crude oil- Hydrocarbon compounds; Non-hydrocarbon compounds; Metallic Compounds, Crude oil classification; Physical separation processes; Conversion processes; Production of ethylene and propylene
Solved Questions
Solved-
Calculate the number of vibrational degrees of freedom in CO2 and SO2.Short Answer 2 Marks May-2015 • PTU B-TECH
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Dec 2015 Calculate the number of vibrational degrees of freedom in SO2.
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Dec 2014 Calculate the number of vibrational degrees of freedom in SO2.
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Distinguish between photophysical and photochemical process.Short Answer 2 Marks May-2015 • PTU B-TECH
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May 2023 a) Distinguish between: i) Thermal and photochemical reactions ii) Fluorescence and phosphorescence
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Dec 2015 Distinguish between thermal and photochemical reactions.
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Dec 2012 Distinguish between photochemical and thermal reactions.
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May 2005 Distinguish between Thermal and photochemical reactions.
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What are Optical Sensors?Short Answer 2 Marks May-2015 • PTU B-TECH
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Dec 2023 What are optical sensors?
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May 2013 What are optical sensors?
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Dec 2012 What are optical sensors?
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Differentiate between Scale and Sludge.Short Answer 2 Marks May-2015 • PTU B-TECH
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What do you mean by Anodic Sacrificial Protection?Short Answer 2 Marks May-2015 • PTU B-TECH
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Dec 2016 Explain cathodic protection for corrosion control.
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May 2014 What is cathodic protection?
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May 2011 Explain cathodic protection.
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Dec 2011 Explain cathodic protection.
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Dec 2005 How is galvanization different from cathodic protection?
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CO2 should not be present in boiler feed water. Why?Short Answer 2 Marks May-2015 • PTU B-TECH
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May 2016 Why should the presence of CO2 be avoided in boiler feed water?
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What are atactic polymers?Short Answer 2 Marks May-2015 • PTU B-TECH
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Dec 2023 Explain the Tacticity of Polymers.
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Dec 2018 What do you understand by tacticity? How can it affect the properties of polymers?
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Dec 2017
What is meant by tacticity of polymers?
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May 2016 How polymers are classified on the basis of tacticity?
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Dec 2016 What do you understand by tacticity? How it can affect the properties of polymers?
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Dec 2011 What do you understand by tacticity in polymers? Explain different types.
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Which of the following will exhibit infrared spectra and why? N2, HCl, O2, CO2.Short Answer 2 Marks May-2015 • PTU B-TECH
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May 2015 Which of the following molecules will show IR spectra and why: H2, HCl, CH4, CO2, H2O
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Dec 2015 Which of the following molecules will show IR spectra and why: H2, HCl, CH4, CO2, H2O?
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Dec 2014 Which of the following molecules will show IR spectra and why: H2, HCl, CH4, CO2, H2O
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What are Reinforced Composite Materials?Short Answer 2 Marks May-2015 • PTU B-TECH
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May 2022 What is meant by polymer reinforced composite?
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Dec 2019 What are polymer reinforced composites?
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May 2013 What are the advantages of composites?
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Dec 2012 What are composite materials? What are the advantages and limitations of polymer reinforced composites?
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What are Coercing Colloids?Short Answer 2 Marks May-2015 • PTU B-TECH
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May 2022 What are coercing colloids? Give its applications.
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May 2019 What are coercing colloids? How are they formed?
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May 2012 What are coercing colloids?
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State and explain Franck-Condon principle.Long Answer 4 Marks May-2015 • PTU B-TECH
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May 2014 Discuss Franck-Condon principle.
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May 2013 Discuss Franck-Condon principle.
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Dec 2012 Explain Franck-Condon principle.
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May 2011 Explain Frank-Condon principle.
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Dec 2010 Discuss Franck-Condon principle.
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May 2005 Explain the Frank-Condon principle.
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Why butadiene shows absorption at higher wavelength than ethene? Give suitable energy level diagram.Long Answer 4 Marks May-2015 • PTU B-TECH
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Dec 2014 Butadiene shows absorption at higher wavelength than ethene. Why?
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Draw a well labelled Jablonski diagram and explain the terms involved in it.Long Answer 4 Marks May-2015 • PTU B-TECH
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Define quantum yield. What are the reasons for low and high quantum yield?Long Answer 4 Marks May-2015 • PTU B-TECH
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Dec 2018 What is quantum yield?
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Dec 2017
Define quantum yield. Give its mathematical expression.
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May 2016 Define quantum yield.
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Dec 2015 Define quantum yield.
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Dec 2012 What is quantum yield?
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Dec 2010 Discuss quantum yield.
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Dec 2008 Define quantum yield and explain with specific examples.
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Dec 2005 What do you understand by quantum yield?
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Discuss the methods of disinfection of water.Long Answer 4 Marks May-2015 • PTU B-TECH
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Calculate the amount of lime and soda required to soften 50,000 litres of water having following analysis: Ca(HCO3)2 = 8.1 mg; Mg(HCO3)2 = 5.0 mg; CaSO4 = 13.6 mg; MgCl2 = 2.0 mg; MgSO4 = 12.0 mg; NaCl = 4.7 mg.Long Answer 4 Marks May-2015 • PTU B-TECH
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Dec 2018 Calculate the amount of soda and lime required for softening 25000 L of water. The quality control lab has reported following salts and their quantities: Ca(HCO3)2 = 15 mg, Mg(HCO3)2 = 10 mg, MgSO4 = 18 mg, CaSO4 = 20 mg, CaCl2 = 8 mg and NaCl = 4 mg. (Atomic Weight of Ca = 40, Mg = 24, Cl = 35.5, Na = 23, S = 32, O = 16, H = 1)
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May 2015 Calculate the quantity of lime and soda needed for softening 60,000 liters of water containing the following salts per liter: Ca(HCO3)2 = 8.6 mg, Mg(HCO3)2 = 7.0 mg, CaSO4 = 13.6 mg, MgSO4 = 12.3 mg, MgCl2 = 2.0 mg and NaCl = 4.9 mg.
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Dec 2014 Calculate the amount of lime and soda required for softening 90,000 liters of water containing the following salts per liter: Ca(HCO3)2 = 162 mg, CaSO4 = 136 mg and NaCl = 56.1 mg. Purity of lime is 92% and soda is 99%.
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May 2011 A water sample on analysis gave the following: Ca2+ = 30 mg/L, Mg2+ = 24 mg/L, CO3 = 32 mg/L, HCl = 50 mg/L, K = 10 mg/L. Calculate the quantities of lime (purity 90%) and soda (purity 94%) required to soften one million litres of water.
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May 2011 A water sample contains 40 ppm of Ca2+, 36 ppm of Mg2+, 48 ppm of SO4^2- and 366 ppm of HCO3-. Calculate the amount of lime and soda needed for softening.
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Dec 2011 Calculate the quantity of lime and soda needed for softening 50,000 litres of water containing the following salts per litre: Ca(HCO3)2 = 8.1 mg; Mg(HCO3)2 = 7.5 mg; CaSO4 = 13.6 mg; MgSO4 = 12.0 mg; MgCl2 = 2.0 mg and NaCl = 4.7 mg.
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Dec 2007 Calculate the amount of lime (91% pure) and soda (97.2% pure) required for softening one million litres of water containing H+ (free acidity) = 1.5 ppm; HCO3- = 396.5 ppm; Mg2+ = 42 ppm; Ca2+ = 90 ppm; FeSO4.7H2O = 14 ppm.
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May 2005 A sample of water was analyzed and found to contain temporary magnesium hardness 25 mg/lit. Permanent magnesium chloride hardness is 15 mg/lit and permanent calcium sulphates hardness 20 mg/lit. SiO2 = 300 mg/lit. Calculate the lime and soda required for softening 30,000 liters of hard water.
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What do you mean by green chemistry? Briefly explain atom economy.Long Answer 4 Marks May-2015 • PTU B-TECH
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Dec 2023 Define Green chemistry.
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May 2020 Explain any two principles of Green Chemistry with the help of examples.
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May 2019 Write in brief about emergence of Green Chemistry.
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May 2017
Define Green Chemistry. What are its applications?
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May 2016 Define Green Chemistry. Explain the differences between traditional approach to reduce pollution and the Green chemistry approach.
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Dec 2014 Explain any three principles of green chemistry with examples.
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May 2013 Explain Green chemistry and its concepts.
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May 2012 What is Green Chemistry? Why is it called so?
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Dec 2011 Define Green Chemistry.
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What are advantages of using ionic liquids in organic reactions?Long Answer 4 Marks May-2015 • PTU B-TECH
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What is Corrosion? Discuss the factors affecting corrosion.Long Answer 4 Marks May-2015 • PTU B-TECH
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Dec 2018 What is waterline corrosion?
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Dec 2016 What is waterline corrosion?
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May 2013 What is differential air corrosion?
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May 2013 What do you understand by stress corrosion? Explain.
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May 2013 What is wet corrosion?
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May 2013 What are the factors which affect corrosion?
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May 2012 What do you understand by Galvanic corrosion?
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May 2012 What is galvanic corrosion?
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May 2011 What is wet corrosion?
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Dec 2011 What do you understand by corrosion and stress corrosion?
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Dec 2010 What is dry corrosion?
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Dec 2010 What do you understand by wet corrosion?
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Explain waterline corrosion.Long Answer 4 Marks May-2015 • PTU B-TECH
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May 2020 Explain the mechanism of galvanic corrosion.
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May 2020 Explain the mechanism of wet corrosion.
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May 2019 Discuss the chemistry and mechanism of wet corrosion.
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Dec 2018 Discuss the mechanism of wet corrosion.
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Dec 2017
Explain the mechanism of electrochemical corrosion with example.
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May 2016 What is corrosion? Explain electrochemical theory of corrosion.
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May 2016 Explain differential metal corrosion.
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Dec 2016 Explain differential aeration corrosion.
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Dec 2016 Give the cause of corrosion.
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May 2015 Explain stress corrosion.
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May 2015 Explain the mechanism of electrochemical corrosion.
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Dec 2015 Describe sacrificial anodic method for corrosion prevention with an example.
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May 2014 Define corrosion. Discuss the mechanism of wet corrosion.
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May 2012 Explain the mechanism of wet corrosion.
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Dec 2012 Describe the mechanism of electrochemical corrosion.
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Dec 2012 Explain dry corrosion.
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Dec 2012 Describe the mechanism of electrochemical corrosion.
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May 2011 Discuss the mechanism of wet corrosion.
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Dec 2011 Discuss mechanism of wet corrosion.
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May 2008 What is corrosion of metals? Explain electro-chemical corrosion with its mechanism.
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Dec 2008 Explain the type of corrosion with evolution of hydrogen ions.
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May 2007 Discuss briefly: Galvanic corrosion
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Dec 2007 Explain briefly galvanic cell corrosion.
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Dec 2007 Explain briefly pitting corrosion.
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Dec 2006 Discuss briefly Galvanic corrosion.
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Explain stress corrosion.Long Answer 4 Marks May-2015 • PTU B-TECH
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May 2020 Explain the mechanism of galvanic corrosion.
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May 2020 Explain the mechanism of wet corrosion.
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May 2019 Discuss the chemistry and mechanism of wet corrosion.
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Dec 2018 Discuss the mechanism of wet corrosion.
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Dec 2017
Explain the mechanism of electrochemical corrosion with example.
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May 2016 What is corrosion? Explain electrochemical theory of corrosion.
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May 2016 Explain differential metal corrosion.
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Dec 2016 Explain differential aeration corrosion.
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Dec 2016 Give the cause of corrosion.
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May 2015 Explain waterline corrosion.
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May 2015 Explain the mechanism of electrochemical corrosion.
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Dec 2015 Describe sacrificial anodic method for corrosion prevention with an example.
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May 2014 Define corrosion. Discuss the mechanism of wet corrosion.
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May 2012 Explain the mechanism of wet corrosion.
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Dec 2012 Describe the mechanism of electrochemical corrosion.
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Dec 2012 Explain dry corrosion.
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Dec 2012 Describe the mechanism of electrochemical corrosion.
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May 2011 Discuss the mechanism of wet corrosion.
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Dec 2011 Discuss mechanism of wet corrosion.
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May 2008 What is corrosion of metals? Explain electro-chemical corrosion with its mechanism.
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Dec 2008 Explain the type of corrosion with evolution of hydrogen ions.
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May 2007 Discuss briefly: Galvanic corrosion
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Dec 2007 Explain briefly galvanic cell corrosion.
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Dec 2007 Explain briefly pitting corrosion.
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Dec 2006 Discuss briefly Galvanic corrosion.
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What is Polymerization? Discuss various types of polymerization.Long Answer 4 Marks May-2015 • PTU B-TECH
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May 2023 a) What are different types of polymerization reactions? Give examples
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May 2020 What are different types of polymerization reactions? Give examples.
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May 2016 What is polymerization?
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May 2014 What is polymerization? Describe the types of polymerization.
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May 2012 What is polymerization? Discuss its types.
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Dec 2011 What is meant by polymerization?
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In a polymer, there are 100 molecules of molecular weight 100, 200 molecules of molecular weight 1000 and 300 molecules of molecular weight 10,000. Find Mn and Mw.Long Answer 4 Marks May-2015 • PTU B-TECH
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Discuss two dimensional assembly and mesoscale assembly.Long Answer 4 Marks May-2015 • PTU B-TECH
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May 2020 Discuss mesoscale self assembly.
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Explain super molecular structures.Long Answer 4 Marks May-2015 • PTU B-TECH
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May 2017
What are supramolecular structures? Discuss their properties.
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Dec 2017
Discuss about supramolecular structures.
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May 2014 Explain supramolecular structures. Give applications of materials having supramolecular structures.
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Dec 2012 Discuss supramolecular structures.
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Dec 2011 Explain supramolecular structures.
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Discuss third generations petrochemicals by giving suitable examples.Long Answer 4 Marks May-2015 • PTU B-TECH
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Dec 2018 What are petrochemicals? Discuss second generation petrochemicals.
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May 2017
Write a brief note on second generation petrochemicals. Give examples.
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Dec 2012 Describe the second generation petrochemicals. Discuss giving examples.
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What is crude oil? Give composition and classification of crude oil.Long Answer 4 Marks May-2015 • PTU B-TECH
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May 2022 What is the composition of crude oil? Also, classify the crude oil in different categories.
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May 2020 Write a short note on classification of crude oil.
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May 2019 How will you classify crude oil?
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May 2019 Describe the composition of crude oil, emphasising on hydrocarbon and non-hydrocarbon components present in it.
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Dec 2018 What is the composition of crude oil? Discuss various petroleum products that come from crude oil.
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Dec 2016 Describe the composition of crude oil.
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Dec 2012 What is Crude Oil? Give its composition and classification.
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FAQ
Frequently Asked Questions
Answers about this subject, solved papers, and preparation.
01 Where can I find engineering chemistry previous year question papers for Bachelor of Technology, 1st-2nd semester?
This page lists engineering chemistry question papers uploaded for Punjab Technical University Bachelor of Technology, 1st-2nd semester, organized for subject-wise browsing where available.
02 Are these official Punjab Technical University question papers?
BRpaper is not the official website of Punjab Technical University. These papers are shared for reference and revision purposes only and are not official university material.
03 How can previous year engineering chemistry papers help in exam preparation?
Reviewing past papers can help you understand how questions are typically framed, notice commonly repeated topics, and get a sense of the exam pattern before your own exam.
04 What kind of topics does engineering chemistry usually cover?
The question papers here relate to the official engineering chemistry syllabus set by the university for this course and semester.
05 Does this page include a engineering chemistry previous year question paper or solved answers?
This page focuses on providing access to the previous year question papers themselves. A separate question bank or solved answers may not be available for every paper.
06 Can I find papers for other subjects in the same Bachelor of Technology?
Yes, BRpaper organizes papers by university, course, stream, and semester, so you can browse other subjects within the same Punjab Technical University Bachelor of Technology.