Solved question paper for CHEMISTRY May-2011 (B-TECH 1st-2nd)
Solved Question Paper
Engineering chemistry May-2011
PTU • B-TECH • Information Technology • 1st-2nd • May-2011
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 wet corrosion?Short Answer 2 Marks May-2011 • PTU B-TECH
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Dec 2018 What is waterline corrosion?
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Dec 2016 What is waterline corrosion?
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May 2015 What is Corrosion? Discuss the factors affecting corrosion.
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May 2013 What is differential air corrosion?
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May 2013 What do you understand by stress corrosion? Explain.
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May 2013 What is wet corrosion?
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May 2013 What are the factors which affect corrosion?
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May 2012 What do you understand by Galvanic corrosion?
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May 2012 What is galvanic corrosion?
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Dec 2011 What do you understand by corrosion and stress corrosion?
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Dec 2010 What is dry corrosion?
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Dec 2010 What do you understand by wet corrosion?
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It is not possible to measure the reduction potential of an isolated half cell. Why?Short Answer 2 Marks May-2011 • PTU B-TECH
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The 1H NMR spectrum of C2H5Br consists of a single line. What could be its structure?Short Answer 2 Marks May-2011 • PTU B-TECH
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May 2014 The ^1H NMR spectrum of C2H4Br2 has only one signal. What could be its structure?
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May 2011 The 1H NMR spectrum of C4H8Br2 has only one signal. What could be its structure?
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Match each absorption band with the following groups: >C=O, -N-H, -O-H, -C=C-; νcm⁻¹: 3400, 2050, 1700, 3350.Short Answer 2 Marks May-2011 • PTU B-TECH
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May 2013 Match each absorption band with the following groups: Functional group C=0 N–H –O–H –C≡C–; v cm–1 3400 2050 1700 3350
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What is photochemistry?Short Answer 2 Marks May-2011 • PTU B-TECH
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May 2019 What is meant by photochemical processes?
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May 2019 Give examples of photochemical processes.
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May 2018
What is photochemistry?
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May 2015 What are primary and secondary photochemical processes?
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May 2013 What is photochemistry?
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May 2012 What are primary and secondary photochemical processes?
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Dec 2011 What is photosensitization?
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Arrange the following in increasing order of UV absorption maxima.Short Answer 2 Marks May-2011 • PTU B-TECH
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May 2013 Arrange the following in increasing order of UV absorption maxima.
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Define eutectic.Short Answer 2 Marks May-2011 • PTU B-TECH
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May 2017
Write the definition of Eutectic point.
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May 2012 Explain Eutectic point.
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What are the advantages of chromatography?Short Answer 2 Marks May-2011 • 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 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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Dec 2006 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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Define phase.Short Answer 2 Marks May-2011 • PTU B-TECH
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May 2013 Define phase rule.
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May 2011 Define phase rule.
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Distinguish between hard water and soft water.Short Answer 2 Marks May-2011 • PTU B-TECH
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May 2022 Distinguish between hard water and soft water.
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May 2013 Distinguish between hard water and soft water.
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Describe Zeolite method for softening of water.Long Answer May-2011 • PTU B-TECH
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May 2016 Discuss in details different methods for softening of water.
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Dec 2016 Discuss the cation and anion exchange resins, and their usefulness for water softening.
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Dec 2016 Explain any two methods of water softening.
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May 2014 Describe Zeolite method for softening of water.
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Dec 2012 Describe ion exchange method for softening of water.
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Dec 2010 Discuss ion exchange method for water softening.
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Dec 2007 Describe the ion exchange process of softening hard water. What are its advantages?
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A water sample on analysis gave the following: Ca2+ = 30 mg/L, Mg2+ = 24 mg/L, CO3 = 32 mg/L, HCl = 50 mg/L, K = 10 mg/L. Calculate the quantities of lime (purity 90%) and soda (purity 94%) required to soften one million litres of water.Long Answer May-2011 • PTU B-TECH
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Dec 2018 Calculate the amount of soda and lime required for softening 25000 L of water. The quality control lab has reported following salts and their quantities: Ca(HCO3)2 = 15 mg, Mg(HCO3)2 = 10 mg, MgSO4 = 18 mg, CaSO4 = 20 mg, CaCl2 = 8 mg and NaCl = 4 mg. (Atomic Weight of Ca = 40, Mg = 24, Cl = 35.5, Na = 23, S = 32, O = 16, H = 1)
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May 2015 Calculate the amount of lime and soda required to soften 50,000 litres of water having following analysis: Ca(HCO3)2 = 8.1 mg; Mg(HCO3)2 = 5.0 mg; CaSO4 = 13.6 mg; MgCl2 = 2.0 mg; MgSO4 = 12.0 mg; NaCl = 4.7 mg.
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May 2015 Calculate the quantity of lime and soda needed for softening 60,000 liters of water containing the following salts per liter: Ca(HCO3)2 = 8.6 mg, Mg(HCO3)2 = 7.0 mg, CaSO4 = 13.6 mg, MgSO4 = 12.3 mg, MgCl2 = 2.0 mg and NaCl = 4.9 mg.
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Dec 2014 Calculate the amount of lime and soda required for softening 90,000 liters of water containing the following salts per liter: Ca(HCO3)2 = 162 mg, CaSO4 = 136 mg and NaCl = 56.1 mg. Purity of lime is 92% and soda is 99%.
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May 2011 A water sample contains 40 ppm of Ca2+, 36 ppm of Mg2+, 48 ppm of SO4^2- and 366 ppm of HCO3-. Calculate the amount of lime and soda needed for softening.
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Dec 2011 Calculate the quantity of lime and soda needed for softening 50,000 litres of water containing the following salts per litre: Ca(HCO3)2 = 8.1 mg; Mg(HCO3)2 = 7.5 mg; CaSO4 = 13.6 mg; MgSO4 = 12.0 mg; MgCl2 = 2.0 mg and NaCl = 4.7 mg.
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Dec 2007 Calculate the amount of lime (91% pure) and soda (97.2% pure) required for softening one million litres of water containing H+ (free acidity) = 1.5 ppm; HCO3- = 396.5 ppm; Mg2+ = 42 ppm; Ca2+ = 90 ppm; FeSO4.7H2O = 14 ppm.
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May 2005 A sample of water was analyzed and found to contain temporary magnesium hardness 25 mg/lit. Permanent magnesium chloride hardness is 15 mg/lit and permanent calcium sulphates hardness 20 mg/lit. SiO2 = 300 mg/lit. Calculate the lime and soda required for softening 30,000 liters of hard water.
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Describe the concentration cell corrosion.Long Answer May-2011 • PTU B-TECH
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Discuss the use of corrosion inhibitors.Long Answer May-2011 • PTU B-TECH
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May 2015 What are inhibitors? Explain types of inhibitors employed to control corrosion.
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Dec 2015 Explain types of inhibitors employed to control corrosion.
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May 2012 Explain the use of inhibitors for corrosion control.
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Dec 2011 Discuss the use of corrosion inhibitors.
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Explain the concept of overvoltage.Short Answer May-2011 • PTU B-TECH
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May 2014 What is over voltage?
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May 2012 What is overvoltage? Discuss the factors affecting overvoltage value.
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Dec 2010 What is over voltage?
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What is liquid junction potential?Short Answer May-2011 • PTU B-TECH
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Dec 2017
What is liquid junction potential? Derive the expression for liquid junction potential.
\r\nHow can it be minimized or eliminated? -
May 2014 Explain liquid junction potential.
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May 2013 What do you understand by liquid junction potential?
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Dec 2012 What is liquid junction potential?
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What is chromatography? Discuss the types of chromatography.Long Answer May-2011 • PTU B-TECH
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May 2017
What is partition chromatography?
-
May 2016 What is the basic principle of Chromatography? Give various types of liquid chromatography.
-
Dec 2016 Name the two phases of chromatography.
-
May 2015 What is the basic principle of chromatographic techniques?
-
May 2015 Discuss various types of liquid chromatography.
-
Dec 2015 What is the basic principle of chromatographic techniques?
-
May 2014 What is chromatography?
-
May 2014 Define chromatography. Discuss various types of chromatography.
-
May 2014 Give the applications of chromatography.
-
May 2013 What do you understand by partition chromatography?
-
May 2013 What are the types of liquid chromatography?
-
May 2012 What is partition chromatography?
-
May 2012 What is chromatography? Discuss its classification.
-
Dec 2012 What is chromatography?
-
Dec 2012 Discuss classification of chromatography.
-
May 2011 What are the advantages of chromatography?
-
Dec 2011 Give the classification of chromatography.
-
May 2010 Explain partition chromatography.
-
May 2010 Explain paper chromatography.
-
May 2010 Explain thin layer chromatography.
-
Dec 2010 How chromatographic separation methods can be classified?
-
Dec 2010 Briefly discuss the applications of chromatography.
-
May 2007 What are various classes of chromatography? Bring out clearly the principles involved in each case.
-
Dec 2007 What are various classes of chromatography? Bring out clearly the principles involved in each case.
-
Dec 2006 What are various classes of chromatography? Bring out clearly the principles involved in each case.
-
May 2005 How are chromatographic techniques classified? Discuss in brief chromatographic mechanism.
-
May 2005 Explain the chromatographic development with suitable example.
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Compare fluorescence with phosphorescence.Short Answer May-2011 • 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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Dec 2014 What is the difference between fluorescence and phosphorescence?
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May 2013 What is fluorescence and how it is different from 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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A substance is known to have a molar absorptivity of 14,000. Calculate the concentration of this substance for absorbance reading of 0.85 in a spectrophotometer.Long Answer May-2011 • PTU B-TECH
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Discuss the principle and working of spectrophotometer with the help of a diagram.Long Answer May-2011 • PTU B-TECH
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Dec 2012 What is spectroscopy? Discuss the principle and working of a spectrophotometer with the help of schematic diagram.
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Give the range for IR, UV and Visible regions of electromagnetic spectrum.Short Answer May-2011 • PTU B-TECH
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What do you understand by chemical shift?Short Answer May-2011 • PTU B-TECH
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May 2013 What do you understand by chemical shift?
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May 2013 What do you understand by chemical shift?
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May 2012 What is chemical shift?
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Explain nuclear overhauser effect.Short Answer May-2011 • PTU B-TECH
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Discuss phase diagram of potassium iodide - water system.Long Answer May-2011 • PTU B-TECH
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Dec 2014 Describe phase diagram of iodine-water system.
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May 2007 Discuss the application of phase rule to potassium iodide-water system.
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Frequently Asked Questions
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.