Solved question paper for CHEMISTRY May-2018 (B-TECH 1st-2nd)
Solved Question Paper
Engineering chemistry May-2018
PTU • B-TECH • Mechanical Engineering • 1st-2nd • May-2018
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-
Section A
1. a) Define over-voltage. Discuss its significances or limitations
Very Short Answer May-2018 • PTU B-TECH -
What are the differences between stable and metastable equilibrium?
Very Short Answer May-2018 • PTU B-TECH-
Dec 2009 What is meant by metastable equilibrium?
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Define chemical actinometer with example & different types.
Very Short Answer May-2018 • PTU B-TECH -
Despite of the involvement of radiations & matter in both, what are the differences
between spectroscopy and photochemistry?Very Short Answer May-2018 • PTU B-TECH-
May 2017
Despite of the involvement of radiations & matter in both, what are the differences
\r\nbetween spectroscopy and photochemistry? -
May 2016 Despite of the involvement of radiations & matter in both, what are the differences between spectroscopy and photochemistry?
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Discuss spin-lattice relaxations. What is their significance?
Very Short Answer May-2018 • PTU B-TECH-
May 2013 Discuss spin-spin relaxation.
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May 2012 Discuss spin-lattice relaxation.
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Dec 2010 Discuss spin-lattice relaxation.
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What is metastable state?
Very Short Answer May-2018 • PTU B-TECH-
May 2017
What is metastable state?
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May 2014 What is metastable state?
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Give the number of components, number of phases & number of degrees of freedom in
Ammonium chloride vapour, partly dissociated into ammonia and HCl.Very Short Answer May-2018 • PTU B-TECH -
What are masers? How do they differ or relate to lasers?
Very Short Answer May-2018 • PTU B-TECH-
May 2014 What are lasers and masers?
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What is the cell reaction occurring in Weston standard cell?
Very Short Answer May-2018 • PTU B-TECH-
May 2016 What is the cell reaction occurring in Weston standard cell?
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Define chemical shift and double resonance.
Very Short Answer May-2018 • PTU B-TECH -
SECTION B
2. Discuss in details various parameters determining quality of water. What should be the range of those parameters for water to be used for drinking and washing purposes?
Short Answer May-2018 • PTU B-TECH -
Discuss in details the wet corrosion. Discuss various preventive measures for various types of corrosions.
Short Answer May-2018 • PTU B-TECH -
Write a detailed note on chromatographic development and applications of chromatography.
Short Answer May-2018 • PTU B-TECH-
Dec 2015 Write short notes on gas chromatography.
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Dec 2015 Write short notes on HPLC.
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May 2007 Write short notes on liquid chromatography.
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May 2007 Write short notes on vapour phase chromatography.
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Dec 2007 Write short note on liquid chromatography.
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Dec 2007 Write short note on vapor phase chromatography.
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Dec 2006 Write short notes on Liquid chromatography.
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Dec 2006 Write short notes on Vapour phase chromatography.
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Dec 2005 Write short notes on Liquid Chromatography.
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Dec 2005 Write short notes on Classification of chromatography Methods.
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Derive Nernst equation. Calculate the mean ionic activity co-efficients of 0.1 moL/Kg HCI, given the emf of the cell
H2 (latm)/ HCI (a), AgCI (s)/Ag
is 0.3524V and that standard electrode potential of Ag-AgCl is 0.2224V @25°C.Short Answer May-2018 • PTU B-TECH-
May 2020 Calculate the mean ionic activity coefficients of 0.1 mol/kg HCl, given the e.m.f. of the cell H2(1 atm)/HCl(a), AgCl(s)/Ag is 0.3524 V and that standard electrode potential of Ag-AgCl is 0.2224 V at 25°C.
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SECTION C
6. Describe in brief the Jablonskii’s diagram and discuss various theories for mechanism of photosynthesis.
Short Answer May-2018 • PTU B-TECH -
What are fundamental bands? Discuss Franck-Condon principle on details.
Short Answer May-2018 • PTU B-TECH -
Give the number of lines in ESR spectrum of anthracene radical anion. Discuss MRI in
details.Short Answer May-2018 • PTU B-TECH -
Lead (m.p. 327oC) and Silver (m.p. 961°C) form eutectic mixture at 303°C with 2.6% by
weight of silver. Discuss the desilverization of lead on the basis of the phase diagram.Long Answer May-2018 • PTU B-TECH
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FAQ
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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.