Solved question paper for CHEMISTRY Dec-2014 (B-TECH 1st-2nd)
Solved Question Paper
Engineering chemistry Dec-2014
PTU • B-TECH • Mechanical Engineering • 1st-2nd • Dec-2014
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
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Explain the selection rules of UV-vis spectroscopy.Short Answer 2 Marks Dec-2014 • PTU B-TECH
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May 2017
Explain the selection rules of UV-vis Spectroscopy.
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Dec 2016 What is ultraviolet and visible spectroscopy known as?
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May 2014 What information can be obtained from the UV-Vis spectrum?
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Dec 2014 Explain the selection rule of UV-vis Spectroscopy.
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May 2012 Explain the uses of UV-visible spectroscopy.
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Dec 2012 Describe the principle of UV-Vis spectroscopy.
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Dec 2011 Discuss theory of UV-visible spectroscopy.
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Dec 2011 Discuss the principle of UV/Visible spectroscopy.
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Dec 2010 Discuss the theory of UV-visible spectroscopy.
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May 2005 What do you understand by UV spectroscopy?
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Explain Beer-Lambert Law.Short Answer 2 Marks Dec-2014 • PTU B-TECH
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May 2022 What is Lambert-Beer’s Law?
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Dec 2018 Define Beer-Lambert law. Derive the equation.
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May 2016 Define Beer-Lambert’s law. What are its limitations?
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Dec 2016 Define Beer-Lambert law. Derive the equation.
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May 2014 Define and explain Grotthus-Draper law and Lambert-Beer law.
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Dec 2014 Explain Beer-Lambert Law.
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Dec 2012 Define Lambert-Beer law.
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Dec 2005 Explain Beer-Lambert Law.
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What is the difference between fluorescence and phosphorescence?Short Answer 2 Marks Dec-2014 • PTU B-TECH
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May 2022 Differentiate between fluorescence and phosphorescence.
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Dec 2016 Give the difference between fluorescence and phosphorescence.
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May 2015 What is fluorescence and how is it different from phosphorescence?
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May 2013 What is fluorescence and how it is different from phosphorescence?
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May 2011 Compare fluorescence with phosphorescence.
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Dec 2011 Differentiate fluorescence from phosphorescence.
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Dec 2010 Differentiate phosphorescence from fluorescence.
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May 2005 Distinguish between Fluorescence and phosphorescence.
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The presence of carbon dioxide in boiled feed water should be avoided. Why?Short Answer 2 Marks Dec-2014 • PTU B-TECH
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What type of reaction vessels are used in microwave reactions?Short Answer 2 Marks Dec-2014 • PTU B-TECH
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Why is rusting of iron in saline water quicker than in ordinary water?Short Answer 2 Marks Dec-2014 • PTU B-TECH
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May 2015 Why is rusting of iron in saline water quicker than in ordinary water?
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Dec 2015 Why is rusting of iron in saline water quicker than in ordinary water?
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Dec 2011 Rusting of iron is quicker in saline water or in ordinary water. Explain.
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Differentiate between addition and condensation polymers.Short Answer 2 Marks Dec-2014 • PTU B-TECH
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May 2022 Differentiate between addition polymerisation and condensation polymerization with suitable examples.
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May 2016 Differentiate between addition polymerization and condensation polymerization. Give examples of addition and condensation polymerization.
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Why do nanoparticles show better catalytic activity than bulk metals?Short Answer 2 Marks Dec-2014 • PTU B-TECH
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What are the properties of natural gas?Short Answer 2 Marks Dec-2014 • PTU B-TECH
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May 2023 b) What is natural gas? Write down the properties of natural gas.
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May 2020 Write a short note on properties of natural gas.
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Dec 2019 Write a note on properties of natural gas.
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“IR spectra is often characterized as molecular finger prints.” Justify this statement.Short Answer 3 Marks Dec-2014 • PTU B-TECH
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May 2015 “IR spectra is often characterized as molecular finger prints.” Justify this statement.
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Dec 2015 “IR spectra is often characterized as molecular finger prints.” Justify this statement.
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Dec 2011 IR spectra is often characterized as molecular finger prints. Explain.
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Calculate the number of vibrational degrees of freedom in CO2.Short Answer 3 Marks Dec-2014 • PTU B-TECH
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May 2015 Calculate the number of vibrational degrees of freedom in the following compounds: (i) CO2 (ii) SO2 (iii) CH4.
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Dec 2015 Calculate the number of vibrational degrees of freedom in CO2.
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Dec 2015 Calculate the number of vibrational degrees of freedom in CH4.
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Dec 2014 Calculate the number of vibrational degrees of freedom in CH4.
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Calculate the number of vibrational degrees of freedom in SO2.Short Answer 3 Marks Dec-2014 • PTU B-TECH
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May 2015 Calculate the number of vibrational degrees of freedom in CO2 and SO2.
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Dec 2015 Calculate the number of vibrational degrees of freedom in SO2.
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Calculate the number of vibrational degrees of freedom in CH4.Short Answer 3 Marks Dec-2014 • PTU B-TECH
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May 2015 Calculate the number of vibrational degrees of freedom in the following compounds: (i) CO2 (ii) SO2 (iii) CH4.
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Dec 2015 Calculate the number of vibrational degrees of freedom in CO2.
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Dec 2015 Calculate the number of vibrational degrees of freedom in CH4.
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Dec 2014 Calculate the number of vibrational degrees of freedom in CO2.
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Which of the following molecules will show IR spectra and why: H2, HCl, CH4, CO2, H2OShort Answer 2 Marks Dec-2014 • PTU B-TECH
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May 2015 Which of the following will exhibit infrared spectra and why? N2, HCl, O2, CO2.
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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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Draw a well labeled Jablonski diagram and explain intersystem crossing.Long Answer 4 Marks Dec-2014 • PTU B-TECH
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May 2020 Draw a well labelled Jablonski diagram and explain intersystem crossing.
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Dec 2014 Draw a well labelled Jablonski diagram and explain intersystem crossing.
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Explain phosphorescence.Short Answer 4 Marks Dec-2014 • PTU B-TECH
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May 2016 Explain phosphorescence.
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Dec 2014 Explain phosphorescence.
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Dec 2012 Explain fluorescence.
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What do you understand by conditioning of boiled feed water? Explain different types of conditioning.Long Answer 8 Marks Dec-2014 • PTU B-TECH
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Write down twelve basic principles of green chemistry.Long Answer 8 Marks Dec-2014 • PTU B-TECH
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May 2022 Name the twelve principles of green chemistry. Explain the use of innocuous reagents in green synthesis.
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Dec 2016 Write any six principles of Green Chemistry.
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Explain any three principles of green chemistry with examples.Long Answer 8 Marks Dec-2014 • 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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May 2015 What do you mean by green chemistry? Briefly explain atom economy.
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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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Explain the electrochemical mechanism of rusting of iron in humid atmosphere.Long Answer 8 Marks Dec-2014 • PTU B-TECH
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May 2017
a) Explain the electrochemical mechanism of rusting of iron in humid atmosphere.
\r\nb) Discuss protective measure for controlling corrosion. -
Dec 2014 Explain the electrochemical mechanism of rusting of iron in humid atmosphere. Discuss any four factors that affect the rate of corrosion.
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Dec 2009 Explain mechanism of rusting of iron in acidic and neutral environment.
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Dec 2005 Explain “rusting of Iron” with the help of electrochemical theory of corrosion.
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Mention any four factors that affect the rate of corrosion.Short Answer 8 Marks Dec-2014 • PTU B-TECH
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Explain detailed synthesis, properties and uses of epoxy resins.Long Answer 8 Marks Dec-2014 • PTU B-TECH
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Explain pros and cons of top-down production processes.Short Answer 4 Marks Dec-2014 • PTU B-TECH
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Dec 2014 Explain pros and cons of bottom-up production processes.
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Explain pros and cons of bottom-up production processes.Short Answer 4 Marks Dec-2014 • PTU B-TECH
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Dec 2014 Explain pros and cons of top-down production processes.
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Describe two examples of processes involving self-assembly or self-organization at the nanoscale.Short Answer 4 Marks Dec-2014 • PTU B-TECH
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Discuss in detail the production process of ethylene.Long Answer 8 Marks Dec-2014 • PTU B-TECH
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May 2017
Discuss in details all the aspects including chemistry of production of ethylene and
\r\npropylene. -
May 2016 Discuss cracking for the production of ethylene.
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May 2016 Discuss purification for the production of ethylene.
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May 2014 Discuss the production of ethylene. Give its use.
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Dec 2014 Discuss in detail the production process of propylene.
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May 2013 Discuss the production of propylene.
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Dec 2011 Discuss the production of ethylene and propylene.
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Discuss in detail the production process of propylene.Long Answer 8 Marks Dec-2014 • PTU B-TECH
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May 2017
Discuss in details all the aspects including chemistry of production of ethylene and
\r\npropylene. -
May 2016 Discuss cracking for the production of ethylene.
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May 2016 Discuss purification for the production of ethylene.
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May 2014 Discuss the production of ethylene. Give its use.
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Dec 2014 Discuss in detail the production process of ethylene.
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May 2013 Discuss the production of propylene.
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Dec 2011 Discuss the production of ethylene and propylene.
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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.
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