Solved question paper for CHEMISTRY Dec-2014 (B-TECH 1st-2nd)
Solved Question Paper
Engineering chemistry Dec-2014
PTU • B-TECH • Mechanical Engineering • 1st-2nd • Dec-2014
engineering chemistry previous year question papers on BRpaper are organized for students of Punjab Technical University’s Bachelor of Technology program, 1st-2nd semester. This section makes it easier to browse subject-wise old question papers for engineering chemistry, so students can review how questions are typically framed in past exams and get a sense of the exam pattern. Many students search for engineering chemistry previous year question paper while preparing for exams, and this page is built to support exactly that kind of subject-wise browsing and revision. BRpaper is not the official website of Punjab Technical University or any institution, and it does not publish official notices or academic updates.
PART A
1. Spectroscopy and its Applications:
An introduction UV/Visible Spectroscopy: Selection rules; Line widths and intensity of spectral lines; Principle and instrumentation; Electronic Transitions; Chromophores & auxochromes; Factors affecting λMax & intensity of spectral lines; Franck-Condon principle; Applications. IR Spectroscopy: Principle and instrumentation; Vibrational frequency; Fundamental modes of vibrations and types; Anharmonics; Factors affecting vibrational frequency; Applications. NMR Spectroscopy: Principle & instrumentation; Chemical shift; Spin-Spin Splitting; High-resolution NMR spectrum (PMR only). (7)
2. Photochemistry:
Introduction; Photo-physical & photochemical processes; Light sources in photochemistry; Beer-Lambert Law; Laws of Photochemistry; Quantum yield (primary and overall); Primary and secondary photochemical reactions; Jablonski diagram; Semiconductor photochemistry, Photovoltaic cells, Introduction to optical sensors, Introduction to supra-molecular photochemistry. (5)
3. Water and its Treatment:
Boiler feed water: Specification, Scales and sludge fermentation; Priming & foaming; Different methods of the water purifications and softening; Desalination of water; Water for domestic use: Specification; Disinfection of water.
4. Green Chemistry and its Applications:
Introductory overview - Definition and concepts of Green chemistry; Emergence of Green chemistry; Twelve principles of Green Chemistry with emphasis on the use of alternative feedstock (biofuels); Use of innocuous reagents in natural processes; Alternative solvents; Design of the safer chemicals; Designing alternative reaction methodology. Microwave and ultrasonic radiation in Green synthesis - Minimizing energy consumption. (4)
PART B
5. Corrosion and its Prevention:
Introduction; Different types of corrosion - Wet and Dry corrosion; Different types of surface films; Mechanisms of wet corrosion; Galvanic corrosion; Galvanic Series; Concentration cell corrosion and differential aeration corrosion; Soil and microbial corrosions; waterline, stress corrosions; Various methods of corrosion control. (5)
6. Polymers and Reinforced Composites:
Introduction; Functionality; Types of polymerization; Specific features of polymers; Structures - regularity and irregularity; Tacticity of polymers; Average molecular weights and size; Determination of molecular weight by number average method; Effect of molecular weight on the properties of polymers; Introduction to polymer reinforced composite. (5)
7. Nanochemistry:
Introduction; Materials self-assembly; Molecular vs. materials self-assembly; Self-assembling materials; Two-dimensional assemblies; Mesoscale self-assembly; Coercing colloids; Nanocrystals; Supramolecular structures; Nanoscale materials; Future perspectives. (5)
8. Petrochemicals:
Introduction; First, second & third generation petrochemicals; Primary Raw Materials for Petrochemicals. Natural gas: Natural gas treatment processes; Natural gas liquids; Properties of natural gas; Crude oil: Composition of crude oil- Hydrocarbon compounds; Non-hydrocarbon compounds; Metallic Compounds, Crude oil classification; Physical separation processes; Conversion processes; Production of ethylene and propylene
Solved Questions
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Why does the Mg(HCO3)2 require double amount of lime for softening?Short Answer Dec-2014 • 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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May 2007 Why does Mg(HCO3)2 require double amount of lime for softening?
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Dec 2006 Why does Mg(HCO3)2 require double amount of lime for softening?
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Describe reason for cracking.Short Answer Dec-2014 • PTU B-TECH
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May 2017
Describe reason for cracking
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With reference to chromatography explain: (a) retention time (b) retention factor.Short Answer Dec-2014 • PTU B-TECH
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What is the difference between electrode potential and cell e.m.f.?Short Answer Dec-2014 • PTU B-TECH
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May 2017
What is the difference electrode potential and cell e. m. f.?
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Differentiate between singlet and triplet state.Short Answer Dec-2014 • PTU B-TECH
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Define isotactic polymers.Short Answer Dec-2014 • PTU B-TECH
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Explain Beer-Lambert Law.Short Answer Dec-2014 • 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 2012 Define Lambert-Beer law.
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Dec 2005 Explain Beer-Lambert Law.
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Explain the selection rule of UV-vis Spectroscopy.Short Answer Dec-2014 • PTU B-TECH
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May 2017
Explain the selection rules of UV-vis Spectroscopy.
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Dec 2016 What is ultraviolet and visible spectroscopy known as?
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May 2014 What information can be obtained from the UV-Vis spectrum?
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Dec 2014 Explain the selection rules of UV-vis spectroscopy.
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May 2012 Explain the uses of UV-visible spectroscopy.
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Dec 2012 Describe the principle of UV-Vis spectroscopy.
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Dec 2011 Discuss theory of UV-visible spectroscopy.
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Dec 2011 Discuss the principle of UV/Visible spectroscopy.
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Dec 2010 Discuss the theory of UV-visible spectroscopy.
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May 2005 What do you understand by UV spectroscopy?
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Determine the number of components, number of phases and degree of freedom on the following equilibria: (i) N2O4(g) ⇌ 2NO2(g) (ii) NH4Cl(s) ⇌ NH3(g) + HCl(g), when P(NH3)=P(HCl).Short Answer Dec-2014 • PTU B-TECH
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May 2015 Determine the number of components, number of phases and degree of freedom for the equilibrium: N2O4(g) ⇌ 2NO2(g).
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May 2015 Determine the number of components, number of phases and degree of freedom for the equilibrium: NH4Cl(s) ⇌ NH3(g) + HCl(g), when P(NH3) ≠ P(HCl).
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Dec 2015 Determine the number of components, number of phases and degree of freedom for the equilibrium N2O4(g) ⇌ 2NO2(g).
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Dec 2015 Determine the number of components, number of phases and degree of freedom for the equilibrium NH4Cl(s) ⇌ NH3(g) + HCl(g), when P(NH3) ≠ P(HCl).
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Which of the following will absorb at higher wave number for C=O stretching?Short Answer Dec-2014 • PTU B-TECH
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May 2017
Which of the following will absorb at higher wave number for C=O stretching?
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Describe the methods of the treatment of municipal water.Long Answer Dec-2014 • PTU B-TECH
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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%.Long Answer Dec-2014 • 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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May 2011 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.
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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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Explain the electrochemical mechanism of rusting of iron in humid atmosphere. Discuss any four factors that affect the rate of corrosion.Long Answer Dec-2014 • 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 2009 Explain mechanism of rusting of iron in acidic and neutral environment.
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Dec 2005 Explain “rusting of Iron” with the help of electrochemical theory of corrosion.
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Compare the working of HPLC with column chromatography.Long Answer Dec-2014 • PTU B-TECH
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Explain the construction and working of a dry cell.Long Answer Dec-2014 • PTU B-TECH
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Explain the construction and working of a lead storage battery.Long Answer Dec-2014 • PTU B-TECH
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Explain the construction and working of a hydrogen-oxygen fuel cell.Long Answer Dec-2014 • PTU B-TECH
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Draw a well labelled Jablonski diagram and explain intersystem crossing.Long Answer Dec-2014 • PTU B-TECH
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May 2020 Draw a well labelled Jablonski diagram and explain intersystem crossing.
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Dec 2014 Draw a well labeled Jablonski diagram and explain intersystem crossing.
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Explain phosphorescence.Long Answer Dec-2014 • PTU B-TECH
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May 2016 Explain phosphorescence.
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Dec 2014 Explain phosphorescence.
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Dec 2012 Explain fluorescence.
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Explain principles of NMR Spectroscopy.Long Answer Dec-2014 • 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 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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Dec 2005 What do you understand by NMR spectroscopy?
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Butadiene shows absorption at higher wavelength than ethene. Why?Short Answer Dec-2014 • PTU B-TECH
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May 2015 Why butadiene shows absorption at higher wavelength than ethene? Give suitable energy level diagram.
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Discuss the NMR spectra of CH3COOCH3.Long Answer Dec-2014 • PTU B-TECH
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Dec 2014 Discuss the NMR spectra of CH3CH2CH3.
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Dec 2014 Discuss the NMR spectra of CH3OCH3.
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Dec 2014 Discuss the NMR spectra of CH3COOCH(CH3)2.
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Discuss the NMR spectra of CH3CH2CH3.Long Answer Dec-2014 • PTU B-TECH
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Dec 2014 Discuss the NMR spectra of CH3COOCH3.
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Dec 2014 Discuss the NMR spectra of CH3OCH3.
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Dec 2014 Discuss the NMR spectra of CH3COOCH(CH3)2.
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Discuss the NMR spectra of CH3OCH3.Long Answer Dec-2014 • PTU B-TECH
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Dec 2014 Discuss the NMR spectra of CH3COOCH3.
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Dec 2014 Discuss the NMR spectra of CH3CH2CH3.
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Dec 2014 Discuss the NMR spectra of CH3COOCH(CH3)2.
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Discuss the NMR spectra of CH3COOCH(CH3)2.Long Answer Dec-2014 • PTU B-TECH
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Dec 2014 Discuss the NMR spectra of CH3COOCH3.
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Dec 2014 Discuss the NMR spectra of CH3CH2CH3.
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Dec 2014 Discuss the NMR spectra of CH3OCH3.
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State and explain phase rule.Long Answer Dec-2014 • PTU B-TECH
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Dec 2015 State and explain phase rule.
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Describe phase diagram of potassium.Long Answer Dec-2014 • PTU B-TECH
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Describe phase diagram of iodine-water system.Long Answer Dec-2014 • PTU B-TECH
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May 2011 Discuss phase diagram of potassium iodide - water system.
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May 2007 Discuss the application of phase rule to potassium iodide-water system.
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Describe phase diagram of nicotine-water system.Long Answer Dec-2014 • PTU B-TECH
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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?
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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?
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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.