Solved question paper for CHEMISTRY Dec-2005 (B-TECH 1st-2nd)
Solved Question Paper
Engineering chemistry Dec-2005
PTU • B-TECH • Mechanical Engineering • 1st-2nd • Dec-2005
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-
What is demineralized water? How is it different from soft water?Short Answer Dec-2005 • PTU B-TECH
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May 2018
What is standard hard Water?
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May 2016 How will distinguish chemically between soft and hard water?
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May 2016 What are the major disadvantages of hard water when used for domestic purposes?
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May 2016 What are the major disadvantages of hard water when used for industrial purposes?
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May 2014 What is soft water? Where is it required?
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May 2013 What is standard hard water?
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Dec 2011 What is standard hard water?
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May 2007 What is demineralized water? How is it different from soft water?
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Dec 2006 What is demenralised water? How is it different from soft water?
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Why does a part of nail inside the wood undergo corrosion easily?Short Answer Dec-2005 • PTU B-TECH
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Dec 2012 Which part of the nail, inside or outside of wood undergoes corrosion readily and why?
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What do you understand by NMR spectroscopy?Short Answer Dec-2005 • PTU B-TECH
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May 2016 Explain the principle of nuclear magnetic resonance spectroscopy.
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Dec 2016 Discuss the principle of NMR spectroscopy.
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Dec 2016 What is NMR and MRS?
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May 2015 Discuss the principles of NMR.
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Dec 2015 What is chemical shift in NMR?
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May 2014 Explain the principle of NMR spectroscopy.
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Dec 2014 Explain principles of NMR Spectroscopy.
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Dec 2012 Explain spin-spin splitting in NMR.
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Dec 2012 Explain the principle of NMR.
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Dec 2011 What information is obtained from spin-spin splitting in NMR?
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Dec 2008 Explain the shielding and deshielding process in NMR-spectroscopy with some suitable examples.
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May 2005 In relation to NMR spectra, explain Chemical Shift and TMS.
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May 2005 In relation to NMR spectra, explain Shielding and Deshielding.
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What do you understand by quantum yield?Short Answer Dec-2005 • 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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May 2015 Define quantum yield. What are the reasons for low and high 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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What is function of salt bridge in an electrochemical cell?Short Answer Dec-2005 • PTU B-TECH
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What is condensed Phase Rule? When is it applied?Short Answer Dec-2005 • PTU B-TECH
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Dec 2017
What do you understand by reduced phase rule?
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May 2014 What is phase rule?
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Dec 2012 What is phase rule?
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May 2010 What is condensed phase rule?
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May 2010 When is condensed phase rule applied?
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May 2005 What is phase rule? What is its significance?
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What type of nuclei show ESR spectra?Short Answer Dec-2005 • PTU B-TECH
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How is galvanization different from cathodic protection?Short Answer Dec-2005 • PTU B-TECH
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Dec 2016 Explain cathodic protection for corrosion control.
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May 2015 What do you mean by Anodic Sacrificial Protection?
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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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How scales are formed in boilers?Short Answer Dec-2005 • PTU B-TECH
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Dec 2011 How scale formation in boilers can be prevented?
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What do you mean by Retaintion factor (Rf)?Short Answer Dec-2005 • PTU B-TECH
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Calculate the amount of lime (84% pure) and soda (92% pure) required for treatment of 20,000 liters of water, whose analysis is as follows Ca(HCO3)2 = 40.5 ppm; Mg(HCO3)2 = 36.5 ppm; MgSO4 = 30.00 ppm; CaSO4 = 34.0 ppm; CaCl2 = 27.75 ppm and NaCl = 10.00 ppm. Also calculate the temporary and permanent hardness of water.Long Answer Dec-2005 • PTU B-TECH
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May 2023 a) Calculate the amount of lime (84% pure) and Soda (92% pure) required for treatment of 20,000 liters of water, whose analysis is as follows Ca(HCO3)2 = 40.5 ppm; Mg(HCO3)2 = 36.5 ppm; MgSO4 = 30.00 ppm; CaSO4 = 34.0 ppm; CaCl2 = 27.75 ppm and NaCl = 10.00 ppm. Also calculate the temporary and permanent hardness of water.
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May 2020 Calculate the amount of lime (84% pure) required for treatment of 20,000 liters of water whose analysis is: Ca(HCO3)2 = 40.5 ppm; Mg(HCO3)2 = 36.5 ppm; MgSO4 = 30.00 ppm; CaSO4 = 34.0 ppm; CaCl2 = 27.75 ppm; NaCl = 10.00 ppm. Also calculate the temporary hardness of water.
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May 2020 Calculate the amount of soda (92% pure) required for treatment of 20,000 liters of water whose analysis is: Ca(HCO3)2 = 40.5 ppm; Mg(HCO3)2 = 36.5 ppm; MgSO4 = 30.00 ppm; CaSO4 = 34.0 ppm; CaCl2 = 27.75 ppm; NaCl = 10.00 ppm. Also calculate the permanent hardness of water.
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May 2007 Calculate the amount of lime (84% pure) and soda (92% pure) required for treatment of 20,000 litres of water whose analysis is as follows: Ca(HCO3)2 = 40.5 ppm; Mg(HCO3)2 = 36.5 ppm; MgSO4 = 30 ppm; CaSO4 = 34 ppm; CaCl2 = 27.75 ppm; NaCl = 10 ppm. Also calculate temporary and permanent hardness of water sample. [Given atomic masses of H = 1, Na = 23, Ca = 40, Mg = 24, O = 16, C = 12, S = 32, Cl = 35.5]
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Dec 2006 Calculate the amount of lime (84% pure) and soda (92% pure) required for treatment of 20,000 litres of water whose analysis is as follows: Ca(HCO3)2 = 40.5 ppm; Mg(HCO3)2 = 36.5 ppm; MgSO4 = 30 ppm; CaSO4 = 34 ppm; CaCl2 = 27.75 ppm; NaCl = 10 ppm. Also calculate temporary and permanent hardness of water sample.
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What is principle of EDTA titration?Short Answer Dec-2005 • PTU B-TECH
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Briefly describe the estimation of hardness of water by EDTA method.Short Answer Dec-2005 • PTU B-TECH
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Explain “rusting of Iron” with the help of electrochemical theory of corrosion.Long Answer Dec-2005 • 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.
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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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Write in brief about pitting corrosion.Short Answer Dec-2005 • PTU B-TECH
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May 2019 Write about stress corrosions in brief.
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Dec 2017
Write a short note on waterline corrosion.
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Write in brief about soil corrosion.Short Answer Dec-2005 • PTU B-TECH
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Dec 2017
Write a note on soil corrosion.
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How the performance of a particular chromatographic system can be assessed?Short Answer Dec-2005 • PTU B-TECH
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Write short notes on Liquid Chromatography.Short Answer Dec-2005 • PTU B-TECH
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May 2018
Write a detailed note on chromatographic development and applications of chromatography.
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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 Classification of chromatography Methods.
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Write short notes on Classification of chromatography Methods.Short Answer Dec-2005 • PTU B-TECH
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May 2018
Write a detailed note on chromatographic development and applications of chromatography.
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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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Derive Nernst equation and give its significance.Long Answer Dec-2005 • PTU B-TECH
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May 2020 Derive Nernst equation.
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Dec 2019 Write down the Nernst equation and define electric potential.
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May 2015 Derive Nernst equation and give its significance.
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Dec 2015 Derive Nernst equation and give its significance.
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Dec 2012 Discuss Nernst\'s equation for electrode potential and emf of cell.
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May 2011 Describe emf of electrochemical cell by taking suitable example.
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May 2007 What is Nernst equation? Write its applications.
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Dec 2006 What is Nernst equation? Write its applications.
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Write equations for each half reaction and calculate Ecell for the following concentration Zn/Zn++ (1.0M)//Zn++ (0.15M)/Zn as the cell discharges.Long Answer Dec-2005 • PTU B-TECH
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Does the concentration of two solutions becomes smaller or larger?Short Answer Dec-2005 • PTU B-TECH
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Explain photosynthesis.Short Answer Dec-2005 • PTU B-TECH
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Dec 2015 Discuss various theories of mechanism of photosynthesis.
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May 2013 Write short note on Photosynthesis.
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May 2012 Discuss the phenomenon of photosynthesis.
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May 2011 Describe mechanism of photosynthesis.
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May 2005 What is meant by photosynthesation?
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Give requirements of laser action.Short Answer Dec-2005 • PTU B-TECH
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Calculate the value of an Einstein of energy in electron volts for radiation of frequency 3 x 10^15.Short Answer Dec-2005 • PTU B-TECH
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Dec 2016 Calculate the value of Einstein of energy in electron volts for radiation of frequency 3×10^15.
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Define and explain the term “Degrees of freedom” of a system with suitable examples.Short Answer Dec-2005 • PTU B-TECH
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May 2010 Define and explain degree of freedom.
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May 2008 Define and explain degree of freedom.
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Draw a labeled phase diagram of water system and discuss the metastable curve and principles freeze drying.Long Answer Dec-2005 • PTU B-TECH
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Explain the intensities of spectra.Short Answer Dec-2005 • PTU B-TECH
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Explain the line width of spectra.Short Answer Dec-2005 • PTU B-TECH
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Dec 2016 What do you understand by natural linewidth of a spectral line?
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Dec 2016 Discuss the factors responsible for intensity of spectral lines.
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May 2012 Discuss factors contributing to the broadening of a spectral line.
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May 2012 Discuss the factors responsible for intensity of spectral lines.
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May 2010 Explain processes that contribute to the finite width of a spectral line.
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May 2008 Explain processes which contribute to the finite width of a spectral line.
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Explain charge transfer transitions.Short Answer Dec-2005 • PTU B-TECH
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Explain Beer-Lambert Law.Short Answer Dec-2005 • 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 2014 Explain Beer-Lambert Law.
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Dec 2012 Define Lambert-Beer law.
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What type of information is obtained by studying the UV spectra of an organic compound?Short Answer Dec-2005 • PTU B-TECH
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Dec 2005 What type of information is obtained by studying the IR spectra of an organic compound?
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What type of information is obtained by studying the IR spectra of an organic compound?Short Answer Dec-2005 • PTU B-TECH
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Dec 2005 What type of information is obtained by studying the UV spectra of an organic compound?
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What type of information is obtained by studying the H-NMR spectra of an organic compound?Short Answer Dec-2005 • PTU B-TECH
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May 2014 What type of information can be obtained from ¹³C NMR spectrum?
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May 2005 What type of nuclei show NMR spectra?
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How many NMR signals are observed in the spectrum of CH3COOCH3?Short Answer Dec-2005 • PTU B-TECH
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May 2020 How many NMR signals are observed in the spectrum of CH3COOCH3?
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May 2020 How many NMR signals are observed in the spectrum of CH3O0CH3?
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Dec 2005 How many NMR signals are observed in the spectrum of CH3OCH3?
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How many NMR signals are observed in the spectrum of CH3-CH2-◊-CH2CH3?Short Answer Dec-2005 • PTU B-TECH
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May 2020 How many signals would you expect to see in the ¹H NMR spectrum of the following compounds?
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May 2020 How many NMR signals are observed in the spectrum of CH3-CH2-CH2CH3?
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Dec 2019 How many signals would you expect to see in the 1H NMR spectrum of the following compound?
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Dec 2018
How many signals would you expect to see in the 1H NMR spectrum of the following :
\r\n\r\nCH3CH2CH2CH3
![\"\"](\"https://i.ibb.co/WHcgnbR/i-q.jpg\")
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Dec 2008 Indicate the number and type of 1H-NMR signals expected in CH3-CH=CH2.
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Dec 2005 How many NMR signals are observed in the spectrum of CH3CH2CH3?
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How many NMR signals are observed in the spectrum of CH3OCH3?Short Answer Dec-2005 • PTU B-TECH
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May 2020 How many NMR signals are observed in the spectrum of CH3COOCH3?
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May 2020 How many NMR signals are observed in the spectrum of CH3O0CH3?
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Dec 2005 How many NMR signals are observed in the spectrum of CH3COOCH3?
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How many NMR signals are observed in the spectrum of CH3CH2CH3?Short Answer Dec-2005 • PTU B-TECH
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May 2020 How many signals would you expect to see in the ¹H NMR spectrum of the following compounds?
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May 2020 How many NMR signals are observed in the spectrum of CH3-CH2-CH2CH3?
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Dec 2019 How many signals would you expect to see in the 1H NMR spectrum of the following compound?
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Dec 2018
How many signals would you expect to see in the 1H NMR spectrum of the following :
\r\n\r\nCH3CH2CH2CH3
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Dec 2008 Indicate the number and type of 1H-NMR signals expected in CH3-CH=CH2.
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Dec 2005 How many NMR signals are observed in the spectrum of CH3-CH2-◊-CH2CH3?
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01 Where can I find engineering chemistry previous year question papers for Bachelor of Technology, 1st-2nd semester?
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02 Are these official Punjab Technical University question papers?
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03 How can previous year engineering chemistry papers help in exam preparation?
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04 What kind of topics does engineering chemistry usually cover?
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