Solved question paper for CHEMISTRY May-2005 (B-TECH 1st-2nd)
Solved Question Paper
Engineering chemistry May-2005
PTU • B-TECH • Electrical Engineering • 1st-2nd • May-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 are zeolites? Why is water softened by zeolite process unfit for use in boilers?Short Answer May-2005 • PTU B-TECH
-
May 2015 Why is water softened before using in a boiler?
-
Dec 2015 Why is water softened before using in a boiler?
-
May 2010 Why is water softened by zeolites unfit for use in boilers?
-
-
State two conditions for wet corrosion to take place.Very Short Answer May-2005 • PTU B-TECH
-
What do you understand by UV spectroscopy?Short Answer May-2005 • PTU B-TECH
-
May 2017
Explain the selection rules of UV-vis Spectroscopy.
-
Dec 2016 What is ultraviolet and visible spectroscopy known as?
-
May 2014 What information can be obtained from the UV-Vis spectrum?
-
Dec 2014 Explain the selection rules of UV-vis spectroscopy.
-
Dec 2014 Explain the selection rule of UV-vis Spectroscopy.
-
May 2012 Explain the uses of UV-visible spectroscopy.
-
Dec 2012 Describe the principle of UV-Vis spectroscopy.
-
Dec 2011 Discuss theory of UV-visible spectroscopy.
-
Dec 2011 Discuss the principle of UV/Visible spectroscopy.
-
Dec 2010 Discuss the theory of UV-visible spectroscopy.
-
-
What is meant by photosynthesation?Short Answer May-2005 • PTU B-TECH
-
Dec 2015 Discuss various theories of mechanism of photosynthesis.
-
May 2013 Write short note on Photosynthesis.
-
May 2012 Discuss the phenomenon of photosynthesis.
-
May 2011 Describe mechanism of photosynthesis.
-
Dec 2005 Explain photosynthesis.
-
-
Why do electrochemical cells stop functioning after some time?Short Answer May-2005 • PTU B-TECH
-
What is phase rule? What is its significance?Short Answer May-2005 • PTU B-TECH
-
Dec 2017
What do you understand by reduced phase rule?
-
May 2014 What is phase rule?
-
Dec 2012 What is phase rule?
-
May 2010 What is condensed phase rule?
-
May 2010 When is condensed phase rule applied?
-
Dec 2005 What is condensed Phase Rule? When is it applied?
-
-
What type of nuclei show NMR spectra?Very Short Answer May-2005 • PTU B-TECH
-
May 2014 What type of information can be obtained from ¹³C NMR spectrum?
-
Dec 2005 What type of information is obtained by studying the H-NMR spectra of an organic compound?
-
-
What is Differential Aeration?Very Short Answer May-2005 • PTU B-TECH
-
Why do we express hardness of water in terms of CaCO3 equivalents?Short Answer May-2005 • PTU B-TECH
-
Dec 2017
SECTION A
1. Compulsory Question:
a) Why do we express hardness of water in terms of CaCO3, equivalents? -
May 2014 Why is hardness of water expressed in terms of calcium carbonate equivalent?
-
-
What do you understand by distribution ratio (D) in chromatography?Short Answer May-2005 • PTU B-TECH
-
What is break point chlorination? Explain showing different zones. What are the advantages of break-point chlorination?Long Answer May-2005 • PTU B-TECH
-
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.Long Answer May-2005 • PTU B-TECH
-
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)
-
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.
-
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.
-
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%.
-
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.
-
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.
-
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.
-
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.
-
-
What is atmospheric corrosion? Why metals like Cu, Pb and Al are corroded slowly than metals like Na, Ca, Fe etc?Short Answer May-2005 • PTU B-TECH
-
Give important cathodic and anodic reactions in presence and absence of oxygen in corrosion.Short Answer May-2005 • PTU B-TECH
-
How are chromatographic techniques classified? Discuss in brief chromatographic mechanism.Short Answer May-2005 • PTU B-TECH
-
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?
-
May 2011 What is chromatography? Discuss the types 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 Explain the chromatographic development with suitable example.
-
-
Explain the chromatographic development with suitable example.Short Answer May-2005 • PTU B-TECH
-
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?
-
May 2011 What is chromatography? Discuss the types 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.
-
-
Describe a typical galvanic cell and show how the chemical energy is converted to electrical energy. What is the relation between free energy, enthalpy, entropy and EMF of the cell?Long Answer May-2005 • PTU B-TECH
-
A cell uses Zn++/Zn and Ag+/Ag electrodes. Write the cell representation, half cell reactions and net cell reaction. Calculate EMF of the cell. Given: E0 Zn++/Zn = -0.76 V and E0 Ag+/Ag = 0.8 VLong Answer May-2005 • PTU B-TECH
-
Distinguish between Thermal and photochemical reactions.Short Answer May-2005 • PTU B-TECH
-
May 2023 a) Distinguish between: i) Thermal and photochemical reactions ii) Fluorescence and phosphorescence
-
May 2015 Distinguish between photophysical and photochemical process.
-
Dec 2015 Distinguish between thermal and photochemical reactions.
-
Dec 2012 Distinguish between photochemical and thermal reactions.
-
-
Distinguish between Fluorescence and phosphorescence.Short Answer May-2005 • PTU B-TECH
-
May 2022 Differentiate between fluorescence and phosphorescence.
-
Dec 2016 Give the difference between fluorescence and phosphorescence.
-
May 2015 What is fluorescence and how is it different from phosphorescence?
-
Dec 2014 What is the difference between fluorescence and phosphorescence?
-
May 2013 What is fluorescence and how it is different from phosphorescence?
-
May 2011 Compare fluorescence with phosphorescence.
-
Dec 2011 Differentiate fluorescence from phosphorescence.
-
Dec 2010 Differentiate phosphorescence from fluorescence.
-
-
The quantum efficiency of photochemical reaction: H2(g) + Cl2(g) → 2HCl(g) is 1.0 x 10^6 with wavelength of 480 nm. Calculate the number of moles of HCl(g) produced per joule of radiant energy absorbed.Long Answer May-2005 • PTU B-TECH
-
May 2023 b) The quantum efficiency of photochemical reaction: \\r\\nH2 (g) + Cl2 (g) 4 2HCl(g)\\r\\nIs 1.0 x 10^6 with wave length of 480nm. Calculate the number of moles of HCl(g) produced per joule of radiant energy absorbed.
-
May 2012 Calculate the number of moles of HCl(g) produced by absorption of one joule of radiant energy of wavelength 480 nm in the following reaction, if the quantum yield of photochemical reaction is 1.0 × 10 6. H2(g) + Cl2(g) → 2HCl(g)
-
-
Define the triple point in water system.Short Answer May-2005 • PTU B-TECH
-
Explain the phase diagram of Sulphur system in detail.Long Answer May-2005 • PTU B-TECH
-
Explain the Frank-Condon principle.Short Answer May-2005 • PTU B-TECH
-
May 2015 State and explain Franck-Condon principle.
-
May 2014 Discuss Franck-Condon principle.
-
May 2013 Discuss Franck-Condon principle.
-
Dec 2012 Explain Franck-Condon principle.
-
May 2011 Explain Frank-Condon principle.
-
Dec 2010 Discuss Franck-Condon principle.
-
-
Explain Chromophores and Auxochromes.Short Answer May-2005 • PTU B-TECH
-
May 2014 What is a chromophore and auxochrome?
-
May 2010 Explain chromophores and auxophores.
-
-
A solution shows a transmittance of 20% when taken in a cell of 2.5 cm thickness. Calculate its concentration, if the molar absorption coefficient is 12,000 dm3 mol-1 cm-1.Long Answer May-2005 • PTU B-TECH
-
May 2020 A solution shows a transmittance of 20% when taken in a cell of 2.5 cm thickness. Calculate its concentration, if the molar absorption coefficient is 12,000 dm³ mol⁻¹ cm⁻¹.
-
-
Predict the NMR spectra of CH3CH2OH, CH2Cl-CHCl2.Short Answer May-2005 • PTU B-TECH
-
In relation to NMR spectra, explain Chemical Shift and TMS.Short Answer May-2005 • PTU B-TECH
-
May 2016 Explain the principle of nuclear magnetic resonance spectroscopy.
-
Dec 2016 Discuss the principle of NMR spectroscopy.
-
Dec 2016 What is NMR and MRS?
-
May 2015 Discuss the principles of NMR.
-
Dec 2015 What is chemical shift in NMR?
-
May 2014 Explain the principle of NMR spectroscopy.
-
Dec 2014 Explain principles of NMR Spectroscopy.
-
Dec 2012 Explain spin-spin splitting in NMR.
-
Dec 2012 Explain the principle of NMR.
-
Dec 2011 What information is obtained from spin-spin splitting in NMR?
-
Dec 2008 Explain the shielding and deshielding process in NMR-spectroscopy with some suitable examples.
-
May 2005 In relation to NMR spectra, explain Shielding and Deshielding.
-
Dec 2005 What do you understand by NMR spectroscopy?
-
-
In relation to NMR spectra, explain Shielding and Deshielding.Short Answer May-2005 • PTU B-TECH
-
May 2016 Explain the principle of nuclear magnetic resonance spectroscopy.
-
Dec 2016 Discuss the principle of NMR spectroscopy.
-
Dec 2016 What is NMR and MRS?
-
May 2015 Discuss the principles of NMR.
-
Dec 2015 What is chemical shift in NMR?
-
May 2014 Explain the principle of NMR spectroscopy.
-
Dec 2014 Explain principles of NMR Spectroscopy.
-
Dec 2012 Explain spin-spin splitting in NMR.
-
Dec 2012 Explain the principle of NMR.
-
Dec 2011 What information is obtained from spin-spin splitting in NMR?
-
Dec 2008 Explain the shielding and deshielding process in NMR-spectroscopy with some suitable examples.
-
May 2005 In relation to NMR spectra, explain Chemical Shift and TMS.
-
Dec 2005 What do you understand by NMR spectroscopy?
-
Explore all data
FAQ
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.