Solved question paper for CHEMISTRY May-2019 (B-TECH 1st-2nd)
Solved Question Paper
Engineering chemistry May-2019
PTU • B-TECH • Information Technology • 1st-2nd • May-2019
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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What are the important features of crystal field theory?Short Answer 2 Marks May-2019 • PTU B-TECH
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Can oxidation state be negative? Discuss.Short Answer 2 Marks May-2019 • PTU B-TECH
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May 2020 Can oxidation state be negative? Discuss.
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Dec 2019 Can oxidation state be negative? Discuss.
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What is the difference between conduction band and valence band?Short Answer 2 Marks May-2019 • PTU B-TECH
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Why is fluorescence so sensitive?Short Answer 2 Marks May-2019 • PTU B-TECH
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Give one main point of difference between wet and dry corrosion.Short Answer 2 Marks May-2019 • PTU B-TECH
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May 2019 Differentiate between concentration cell corrosion and differential aeration corrosion.
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May 2017
Differentiate between dry and wet corrosion.
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May 2016 Compare dry and wet corrosion.
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May 2014 Differentiate wet corrosion from dry corrosion.
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Write the transition state for the following SN2 reaction: (CH3)3N + (CH3)3S+ → (CH3)4N+ + (CH3)2SShort Answer 2 Marks May-2019 • PTU B-TECH
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Why do d and f orbitals show poor shielding effect?Short Answer 2 Marks May-2019 • PTU B-TECH
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Dec 2019 Why d and f orbital show poor shielding effect?
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How do van der Waals interactions occur?Short Answer 2 Marks May-2019 • PTU B-TECH
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May 2020 What are van der Waals forces? Discuss them briefly.
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Dec 2019 How do Vander Waals interactions occur?
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The following compounds show only one signal in 1H NMR. Write their structural formula: C5H12 and C2H6O.Short Answer 2 Marks May-2019 • PTU B-TECH
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Indicate R or S configuration at stereogenic center(s). Assign priorities to each group.Short Answer 2 Marks May-2019 • PTU B-TECH
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Obtain the time-dependent Schrodinger wave equation for a particle.Long Answer 6 Marks May-2019 • PTU B-TECH
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Dec 2019 Obtain the time-dependent Schrödinger wave equation for a particle.
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Give the physical meaning of wave function.Short Answer 2 Marks May-2019 • PTU B-TECH
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May 2020 Give the physical meaning of wave function.
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Dec 2019 Give the physical meaning of wave function.
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What is crystal field theory? How does this theory account for the fact that [CoF6]3− is paramagnetic but [Co(NH3)6]3+ is diamagnetic though both are octahedral?Long Answer 6 Marks May-2019 • PTU B-TECH
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May 2020 What is crystal field theory? How does this theory account for the fact that [CoF6] is paramagnetic but [Co(NH3)6] is diamagnetic though both are octahedral?
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Dec 2019 What is crystal field theory? How does this theory account for the fact that [CoF6] is paramagnetic but [Co(NH3)6] is diamagnetic though both are octahedral?
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Discuss the role of doping on the band structure of solids.Short Answer 2 Marks May-2019 • PTU B-TECH
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Dec 2019 Discuss the role of doping on the band structure of solids.
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Why is UV-Visible spectroscopy called electronic spectroscopy? Explain various types of transitions for organic molecules that take place in UV-Visible range.Long Answer 5 Marks May-2019 • PTU B-TECH
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May 2022 Why molecules absorb in UV-Visible region? What are the types of electronic transitions that can occur in a molecule? Explain giving examples.
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How is fluorescence used in medicine? What is the unit of fluorescence intensity?Short Answer 3 Marks May-2019 • PTU B-TECH
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Derive the van der Waals equation for describing P-V-T relationship in real gases.Long Answer 5 Marks May-2019 • PTU B-TECH
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Dec 2019 Derive the van der Waals equation for describing P-V-T relationship in real gases.
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The van der Waals constants of a gas are: a = 0.751 dm6 atm mol−2 and b = 0.0226 dm3 mol−1. Calculate critical constants.Short Answer 3 Marks May-2019 • PTU B-TECH
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May 2020 The van der Waals constants of a gas are a = 0.751 dm^6 atm mol^-2 and b = 0.0226 dm^3 mol^-1. Calculate critical constants.
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Calculate the standard free energy change (ΔG°) of the reaction: CO(g) + 1/2 O2(g) → CO2(g), ΔH° = –282.84 kJ. The standard entropy of CO2(g), CO(g) and O2(g) are 213.80, 197.90 and 205.01 J K−1 mol−1, respectively. Is this reaction feasible at standard state?Long Answer 4 Marks May-2019 • PTU B-TECH
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What advantages does the use of ion-exchange resin provide over zeolite process for softening of hard water?Short Answer 4 Marks May-2019 • PTU B-TECH
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Dec 2018 What advantages does the use of ion-exchange resin provide over zeolite process for softening of hard water?
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Discuss the molecular geometries of the following: i) BCl3 ii) PCl5.Short Answer 4 Marks May-2019 • PTU B-TECH
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May 2020 Discuss the molecular geometry of PCl5.
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Dec 2019 Discuss the molecular geometry of PCl5.
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What is effective nuclear charge? Which element has the highest effective nuclear charge?Short Answer 2 Marks May-2019 • PTU B-TECH
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May 2020 What is effective nuclear charge?
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May 2020 Which element has the highest effective nuclear charge?
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Dec 2019 What do you understand by effective nuclear charge?
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Dec 2019 What is effective nuclear charge? Which element has the highest effective nuclear charge?
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Dec 2018
What do you understand by effective nuclear charge?
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What is ionization energy? Which elements have the highest ionization energy?Short Answer 2 Marks May-2019 • PTU B-TECH
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May 2020 What is ionization energy?
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May 2020 Which elements have the highest ionization energy?
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Dec 2019 What is ionization energy? Which elements have the highest ionization energy?
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Discuss isomerism in transitional metal complexes.Long Answer 5 Marks May-2019 • PTU B-TECH
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The following compound has only one stereogenic center. Why then does it have four stereoisomers? Explain.Short Answer 3 Marks May-2019 • PTU B-TECH
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Explain SN2 mechanism by taking an example of alkyl halide as a substrate.Short Answer 4 Marks May-2019 • PTU B-TECH
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Dec 2019 Discuss the SN2 mechanism of alkyl halides in terms of kinetics, stereochemistry and reactivity of alkyl halides.
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Write short notes on the following organic reactions: i) Oxidation reactions ii) Ring opening reactions.Short Answer 4 Marks May-2019 • PTU B-TECH
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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.
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.