Top 20 Questions of CHEMISTRY (B-TECH Electronics and Communication Engineering 1st-2nd)
Most Repeated Questions
Top 20 Questions of Engineering chemistry
Previous year question paper with solutions for Top repeated questions of Engineering chemistry
PTU • B-TECH • Electronics and Communication Engineering • 1st-2nd
Browse Top 20 questions of CHEMISTRY (B-TECH Electronics and Communication Engineering 1st-2nd) previous year question papers for Top repeated questions of Engineering chemistry. This page helps CHEMISTRY students find semester-wise papers for revision, exam practice, and understanding previous exam patterns. These are the top twenty repeated questions identified from previous year papers for CHEMISTRY (B-TECH Electronics and Communication Engineering 1st-2nd), helping students focus on the most frequently asked topics.
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
Top repeated questions
Top 20-
1.
What is partition chromatography?
Appeared 28 times
Appeared in: May 2017, May 2016, Dec 2016, May 2015, Dec 2015, May 2014, May 2013, May 2012, Dec 2012, May 2011, Dec 2011, May 2010, Dec 2010, May 2007, Dec 2007, Dec 2006, May 2005
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2.
Explain the mechanism of electrochemical corrosion with example.
Appeared 26 times
Appeared in: May 2020, May 2019, Dec 2018, Dec 2017, May 2016, Dec 2016, May 2015, Dec 2015, May 2014, May 2012, Dec 2012, May 2011, Dec 2011, May 2008, Dec 2008, May 2007, Dec 2007, Dec 2006
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3.
What information is obtained from spin-spin splitting in NMR?
Appeared 14 times
Appeared in: May 2016, Dec 2016, May 2015, Dec 2015, May 2014, Dec 2014, Dec 2012, Dec 2011, Dec 2008, May 2005, Dec 2005
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4.
What do you understand by Galvanic corrosion?
Appeared 13 times
Appeared in: Dec 2018, Dec 2016, May 2015, May 2013, May 2012, May 2011, Dec 2011, Dec 2010
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5.
a) Discuss the importance of design and material selection in controlling corrosion.
Appeared 12 times
Appeared in: May 2023, Dec 2019, May 2013, May 2012, Dec 2012, May 2007, Dec 2007, Dec 2006
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