Solved question paper for CHEMISTRY Dec-2006 (B-TECH 1st-2nd)
Solved Question Paper
Engineering chemistry Dec-2006
PTU • B-TECH • Mechanical Engineering • 1st-2nd • Dec-2006
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-
Explain why blocks of magnesium are often stripped to the steel hulls of ocean-going ships?Short Answer Dec-2006 • PTU B-TECH
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May 2007 Explain why blocks of magnesium are often stripped to the steel hulls of ocean-going ships?
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What is colloidal conditioning of boiler feed water?Short Answer Dec-2006 • PTU B-TECH
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May 2022 What is calgon conditioning of boiler feed water?
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Dec 2016 What is boiler feed water and boiler corrosion?
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May 2014 What are the specifications for boiler feed water?
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May 2007 What is colloidal conditioning of boiler feed water?
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Dec 2007 What is Calgon conditioning of boiler feed water?
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What is the importance of IR spectroscopy in finger print region?Short Answer Dec-2006 • PTU B-TECH
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May 2022 What is the importance of ‘finger print region’ in infrared spectroscopy?
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May 2020 What is the importance of finger print region in IR spectroscopy?
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May 2007 What is the importance of IR spectroscopy in fingerprint region?
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Dec 2007 What is the importance of IR spectroscopy in the fingerprint region?
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How will you verify that a particular signal in NMR spectrum arises from –OH, -NH or –SH groups?Short Answer Dec-2006 • PTU B-TECH
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May 2007 How will you verify that a particular signal in NMR spectrum arises from –OH, -NH or -SH groups?
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Dec 2007 How will you verify that a particular signal in NMR spectrum arises from –OH, –NH or –SH groups?
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How does temperature affect rate of photosynthesis in plants?Short Answer Dec-2006 • PTU B-TECH
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May 2007 How does temperature affect rate of photosynthesis in plants?
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A substance Z has its triple point at 18 ºC and 0.5 atm., its normal melting and boiling points are 20ºC and 300ºC respectively. Sketch the schematic phase diagram for Z.Long Answer Dec-2006 • PTU B-TECH
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May 2007 A substance Z has its triple point at 18 ºC and 0.5 atm., its normal melting and boiling points are 20ºC and 300ºC respectively. Sketch the schematic phase diagram for Z.
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For a cell reaction A(s) + 2B(aq) → A2+(aq) + 2B(s) at 298 K, the equilibrium constant is 1.0 x 10^4. Calculate E0cell.Short Answer Dec-2006 • PTU B-TECH
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May 2020 For a cell reaction A(s) + 2B(aq) → A2+(aq) + 2B(s) at 298 K, the equilibrium constant is 1.0 × 10^30. Calculate E°cell.
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May 2007 For a cell reaction A(s) + 2B(aq) → A2+(aq) + 2B(s) at 298 K, the equilibrium constant is 1.0 × 10^4. Calculate E0cell.
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What is Rf value in chromatography?Short Answer Dec-2006 • PTU B-TECH
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May 2010 What is R value in chromatography?
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May 2007 What is Rf value in chromatography?
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Dec 2007 What is Rf value in chromatography?
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Why does Mg(HCO3)2 require double amount of lime for softening?Short Answer Dec-2006 • PTU B-TECH
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May 2020 Why does Mg(HCO3)2 require double amount of lime for softening?
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Dec 2014 Why does the Mg(HCO3)2 require double amount of lime for softening?
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May 2007 Why does Mg(HCO3)2 require double amount of lime for softening?
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What is UV spectrum? Give various regions associated with UV spectrum.Short Answer Dec-2006 • PTU B-TECH
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May 2007 What is UV spectrum? Give various regions associated with UV spectrum.
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What are lime and soda? Compare hot and cold soda lime process for softening of hard water.Long Answer Dec-2006 • PTU B-TECH
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May 2020 Compare hot and cold soda lime process for softening of hard water.
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Dec 2015 Explain the cold lime-soda process for the removal of hardness of water and give the difference between cold and hot lime-soda process.
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May 2007 What are lime and soda? Compare hot and cold soda lime process for softening of hard water.
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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.Long Answer Dec-2006 • 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 2005 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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What is demenralised water? How is it different from soft water?Short Answer Dec-2006 • 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 2005 What is demineralized water? How is it different from soft water?
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Discuss the importance of design and material selection in controlling corrosion.Long Answer Dec-2006 • PTU B-TECH
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May 2023 a) Discuss the importance of design and material selection in controlling corrosion.
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Dec 2019 Discuss briefly about differential aeration corrosion.
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May 2013 Explain the protective measures of controlling corrosion.
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May 2013 Discuss atmospheric corrosion.
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May 2012 Discuss metal alloys for corrosion control.
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May 2012 Discuss anodic and cathodic coating for corrosion control.
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Dec 2012 Discuss differential aeration corrosion.
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May 2007 Discuss the importance of design and material selection in controlling corrosion.
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May 2007 Discuss briefly: Stress corrosion
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Dec 2007 Describe various methods employed for protection of metals from corrosion.
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Dec 2006 Discuss briefly Stress corrosion.
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Discuss briefly Galvanic corrosion.Short Answer Dec-2006 • 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 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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Discuss briefly Stress corrosion.Short Answer Dec-2006 • PTU B-TECH
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May 2023 a) Discuss the importance of design and material selection in controlling corrosion.
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Dec 2019 Discuss briefly about differential aeration corrosion.
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May 2013 Explain the protective measures of controlling corrosion.
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May 2013 Discuss atmospheric corrosion.
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May 2012 Discuss metal alloys for corrosion control.
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May 2012 Discuss anodic and cathodic coating for corrosion control.
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Dec 2012 Discuss differential aeration corrosion.
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May 2007 Discuss the importance of design and material selection in controlling corrosion.
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May 2007 Discuss briefly: Stress corrosion
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Dec 2007 Describe various methods employed for protection of metals from corrosion.
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Dec 2006 Discuss the importance of design and material selection in controlling corrosion.
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Why steel does not rust if covered with ice?Short Answer Dec-2006 • PTU B-TECH
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May 2023 c) Why does steel not rust if covered with ice?
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May 2007 Why steel does not rust if covered with ice?
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What are various classes of chromatography? Bring out clearly the principles involved in each case.Long Answer Dec-2006 • PTU B-TECH
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May 2017
What is partition chromatography?
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May 2016 What is the basic principle of Chromatography? Give various types of liquid chromatography.
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Dec 2016 Name the two phases of chromatography.
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May 2015 What is the basic principle of chromatographic techniques?
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May 2015 Discuss various types of liquid chromatography.
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Dec 2015 What is the basic principle of chromatographic techniques?
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May 2014 What is chromatography?
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May 2014 Define chromatography. Discuss various types of chromatography.
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May 2014 Give the applications of chromatography.
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May 2013 What do you understand by partition chromatography?
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May 2013 What are the types of liquid chromatography?
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May 2012 What is partition chromatography?
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May 2012 What is chromatography? Discuss its classification.
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Dec 2012 What is chromatography?
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Dec 2012 Discuss classification of chromatography.
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May 2011 What are the advantages of chromatography?
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May 2011 What is chromatography? Discuss the types of chromatography.
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Dec 2011 Give the classification of chromatography.
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May 2010 Explain partition chromatography.
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May 2010 Explain paper chromatography.
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May 2010 Explain thin layer chromatography.
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Dec 2010 How chromatographic separation methods can be classified?
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Dec 2010 Briefly discuss the applications of chromatography.
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May 2007 What are various classes of chromatography? Bring out clearly the principles involved in each case.
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Dec 2007 What are various classes of chromatography? Bring out clearly the principles involved in each case.
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May 2005 How are chromatographic techniques classified? Discuss in brief chromatographic mechanism.
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May 2005 Explain the chromatographic development with suitable example.
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Write short notes on Liquid chromatography.Short Answer Dec-2006 • 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 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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Write short notes on Vapour phase chromatography.Short Answer Dec-2006 • 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 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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What is Nernst equation? Write its applications.Short Answer Dec-2006 • 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 2005 Derive Nernst equation and give its significance.
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The e.m.f. of the cell reaction 3Sn4+ + 2Cr → 3Sn2+ + 2Cr3+ is 0.89V. Calculate the standard free energy change for the reaction.Short Answer Dec-2006 • PTU B-TECH
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May 2007 The e.m.f. of the cell reaction 3Sn4+ + 2Cr → 3Sn2+ + 2Cr3+ is 0.89 V. Calculate the standard free energy change for the reaction.
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State and explain Einstein’s law of photochemical equivalence.Short Answer Dec-2006 • PTU B-TECH
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May 2020 State the law of photochemical equivalence.
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May 2014 State the law of photochemical equivalence.
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May 2008 Explain Stark-Einstein law of photochemical equivalence?
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May 2007 State and explain Einstein’s law of photochemical equivalence.
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Describe and discuss Jablonski diagram for depicting various photo processes.Long Answer Dec-2006 • PTU B-TECH
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May 2010 Describe and discuss Jablonski diagram for depicting various photo processes.
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May 2007 Describe and discuss Jablonski diagram for depicting various photo processes.
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Write a short note on lasers and their uses.Short Answer Dec-2006 • PTU B-TECH
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May 2013 Write short note on Lasers.
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May 2007 Write a short note on lasers and their uses.
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Define the term bathochromic shift and hypso chromic shift. What structural feature may produce bathochromic of a hypsochromic shift in an organic compound.Short Answer Dec-2006 • PTU B-TECH
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May 2007 Define the term bath chromic shift and hypso chromic shift. What structural feature may produce bath chromic of a hypsochromic shift in an organic compound?
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In an absorption cell, the transmittance of 0.1M solution of a substance X is 80% and that of 0.1 M solution of another substance Y is 60% at a given wavelength. What is the transmittance of solution that is simultaneously 0.1M in X and 0.1 M in Y.Short Answer Dec-2006 • PTU B-TECH
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May 2007 In an absorption cell, the transmittance of 0.1M solution of a substance X is 80% and that of 0.1 M solution of another substance Y is 60% at a given wavelength. What is the transmittance of solution that is simultaneously 0.1M in X and 0.1 M in Y?
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Using IR spectroscopy, how will you determine whether the oxygen in an organic compound is present as a carbonyl or hydroxyl group?Short Answer Dec-2006 • PTU B-TECH
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May 2007 Using IR spectroscopy, how will you determine whether the oxygen in an organic compound is present as a carbonyl or hydroxyl group?
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How will you distinguish primary, secondary and tertiary alcohols on the basis of PMR spectroscopy?Short Answer Dec-2006 • PTU B-TECH
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May 2007 How will you distinguish primary, secondary and tertiary alcohols on the basis of PMR spectroscopy?
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Write brief notes on Chemical Shift.Short Answer Dec-2006 • PTU B-TECH
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May 2010 Write short notes on chemical shift.
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May 2007 Write brief notes on chemical shift.
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Dec 2007 Write brief note on chemical shift.
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Write brief notes on Spin-spin coupling.Short Answer Dec-2006 • PTU B-TECH
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Dec 2023 Explain the Spin-Spin coupling.
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May 2013 What information can be obtained from spin-spin coupling?
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Dec 2010 What do you understand by spin-spin coupling?
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May 2007 Write brief notes on spin-spin coupling.
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Dec 2007 Write brief note on spin-spin coupling.
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Write brief notes on Coupling constant.Short Answer Dec-2006 • PTU B-TECH
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May 2007 Write brief notes on coupling constant.
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State Gibbs phase rule and explain the terms involved in it.Short Answer Dec-2006 • PTU B-TECH
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May 2007 State Gibbs phase rule and explain the terms involved in it.
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Discuss the application of phase rule to potassium iodide-water system. Explain the formation of freezing mixtures by addition of suitable salts to ice.Long Answer Dec-2006 • 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?
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02 Are these official Punjab Technical University question papers?
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