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-
Give difference between photochemical and thermal reactions.Short Answer 2 Marks May-2011 • PTU B-TECH
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May 2015 How do photochemical reactions differ from thermal reactions? Discuss Stark-Einstein law of photochemical equivalence.
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Dec 2011 How photochemical reactions differ from thermal reactions? Discuss Stark-Einstein law of photochemical equivalence.
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Why is salt bridge used in concentration cell?Short Answer 2 Marks May-2011 • PTU B-TECH
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What is meant by rusting of iron?Short Answer 2 Marks May-2011 • PTU B-TECH
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What salts are responsible for temporary and permanent hardness of water?Short Answer 2 Marks May-2011 • PTU B-TECH
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May 2020 How are salts responsible for the temporary and permanent hardness of water? Explain.
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May 2017
SECTION-A
1. Write briefly :
a) Explain temporary and permanent hardness of water.
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May 2013 What salts are responsible for temporary and permanent hardness of water?
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May 2012 Explain temporary and permanent hardness of water.
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Dec 2012 Name the salts responsible for temporary and permanent hardness of water.
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Dec 2011 Explain degree of hardness of water.
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Dec 2008 How are salts responsible for the temporary and permanent hardness of water? Explain.
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What do you understand by finger print region?Short Answer 2 Marks May-2011 • PTU B-TECH
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1, 3 - Butadiene possess λmax at higher value than that of ethene. Explain.Short Answer 2 Marks May-2011 • PTU B-TECH
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Give the possible vibration(s) for a molecule of HCl.Short Answer 2 Marks May-2011 • PTU B-TECH
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Match λmax of 294 and 274 nm for cis-stilbene / trans-stilbene (C6H5-CH=CH-C6H5). Explain your observation.Short Answer 2 Marks May-2011 • PTU B-TECH
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The 1H NMR spectrum of C4H8Br2 has only one signal. 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 C2H5Br consists of a single line. What could be its structure?
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Define phase rule.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.
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Discuss chemical coagulants used for municipal water.Long Answer 8 Marks May-2011 • PTU B-TECH
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Dec 2011 Discuss chemical coagulants used for municipal water.
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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.Long Answer 8 Marks 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 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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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 cathodic protection.Long Answer 8 Marks May-2011 • PTU B-TECH
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Dec 2016 Explain cathodic protection for corrosion control.
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May 2015 What do you mean by Anodic Sacrificial Protection?
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May 2014 What is cathodic protection?
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Dec 2011 Explain cathodic protection.
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Dec 2005 How is galvanization different from cathodic protection?
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Discuss the mechanism of wet corrosion.Long Answer 8 Marks May-2011 • 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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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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Dec 2006 Discuss briefly Galvanic corrosion.
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Discuss the concentration cells.Long Answer 8 Marks May-2011 • PTU B-TECH
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May 2020 What are concentration cells?
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May 2013 Define concentration cells.
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May 2012 Discuss the concentration cell.
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Describe emf of electrochemical cell by taking suitable example.Long Answer 8 Marks May-2011 • 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 2007 What is Nernst equation? Write its applications.
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Dec 2006 What is Nernst equation? Write its applications.
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Dec 2005 Derive Nernst equation and give its significance.
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Draw the flow-diagram of liquid chromatography instrument. Discuss its principle.Long Answer 8 Marks May-2011 • PTU B-TECH
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Dec 2017
Discuss the principle behind liquid chromatography.
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May 2016 Describe the instrumentation of HPLC & flow diagram of LC instruments.
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May 2013 Define chromatography. Draw flow diagram of LC instrument.
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Describe mechanism of photosynthesis.Long Answer 8 Marks May-2011 • PTU B-TECH
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Dec 2015 Discuss various theories of mechanism of photosynthesis.
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May 2013 Write short note on Photosynthesis.
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May 2012 Discuss the phenomenon of photosynthesis.
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May 2005 What is meant by photosynthesation?
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Dec 2005 Explain photosynthesis.
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A solution containing 30.1 g/L of a dye, in 1 cm cell, absorbs 50% of blue light (λ = 435 nm). Under the same conditions, what percentage of light will be absorbed by a solution containing 15.05 g/L of the dye?Long Answer 8 Marks May-2011 • PTU B-TECH
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Give the scope of IR spectroscopy.Long Answer 8 Marks May-2011 • PTU B-TECH
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Dec 2023 What are the applications of IR spectroscopy?
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May 2013 Discuss the principles of IR Spectroscopy.
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May 2012 Discuss IR spectroscopy and its applications.
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Dec 2012 Discuss the applications of IR spectroscopy.
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Explain Frank-Condon principle.Long Answer 8 Marks May-2011 • PTU B-TECH
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May 2015 State and explain Franck-Condon principle.
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May 2014 Discuss Franck-Condon principle.
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May 2013 Discuss Franck-Condon principle.
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Dec 2012 Explain Franck-Condon principle.
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Dec 2010 Discuss Franck-Condon principle.
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May 2005 Explain the Frank-Condon principle.
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Discuss magnetic resonance imaging.Long Answer 8 Marks May-2011 • PTU B-TECH
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Explain shielding and deshielding of protons.Long Answer 8 Marks May-2011 • PTU B-TECH
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Dec 2011 What is meant by shielding and deshielding of a proton nucleus?
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Draw and discuss phase diagram of Helium system.Long Answer 8 Marks May-2011 • PTU B-TECH
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May 2014 Discuss phase diagram of helium.
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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.