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Environmental Science and Green chemistry — Major (End Semester) 2025 question paper

MMMUT Information Technology previous year question paper for Environmental Science and Green chemistry, semester 2, Major (End Semester) 2025. All 24 questions are listed below, each with a written answer on Nexsus.

Paper details

  • Subject: Environmental Science and Green chemistry
  • Branch: Information Technology
  • Semester: 2
  • Exam: Major (End Semester) 2025
  • Questions: 24

Questions asked in Environmental Science and Green chemistry Major (End Semester) 2025

  1. Q1(a). a) Explain the following: i) Ethylene glycol is more viscous than ethanol. ii) o-nitrophenol is more volatile than p-nitrophenol. [2 marks]
  2. Q1(b). b) How does electronegativity of elements vary across a period and down a group? Explain with examples. [2 marks]
  3. Q1(c). c) Explain the mechanism of Cannizzaro reaction with the help of suitable example. [2 marks]
  4. Q1(d). d) Write a short note on ozone depletion and its harmful effects. [2 marks]
  5. Q1(e). e) Draw the MO diagram of O_2 molecule and explain its paramagnetic nature. Determine the bond order of O_2, O_2+ andO_2- molecules. [2 marks]
  6. Q1(f). f) Write a short note on the main impurities present in water and their effects. [2 marks]
  7. Q1(g). g) Explain the principle of Zeolite process of water softening. Give the chemical reactions taking place during the softening of water with this process. [2 marks]
  8. Q2(a). a) Explain various electronic transitions taking place during the absorption of UV-Visible radiation by molecules. Describe various applications of this technique. [5 marks]
  9. Q2(b). b) Explain the following terms (Any five) i) Absorbance ii) Transmittance iii) Chromophore iv) Auxochrome v) Bathochromic Shift vi) Hypsochromic Shift [5 marks]
  10. Q2(c). c) Explain the principle of IR spectroscopy using diagram. What are the conditions required for a molecular vibration to be IR active. What are the IR active and IR-inactive transitions for $CO_2$ molecule? [5 marks]
  11. Q3(a). a) Predict the number of signals that will be observed in the {H-NMR} spectrum of the following compounds [5 marks]
  12. Q3(b). b) Write an explanatory note on the incineration and its use for the disposal of polymeric waste. [5 marks]
  13. Q3(c). c) Give the synthesis of (equations only) the following polymers: i) PVC, ii) PET, iii) PMMA iv) Buna-N and Nylon-6,6. OR Give the classification of polymers. [5 marks]
  14. Q4(a). a) Compare traditional chemical synthesis pathways with green chemical synthesis pathways. Highlight the differences in terms of efficiency, waste production, and environmental impact with the help of two examples of industrial chemicals. [5 marks]
  15. Q4(b). b) Explain microwave-assisted synthesis. How does it differ from conventional heating methods? What are its advantages in green chemical processes? Give two examples of reactions facilitated by microwave heating. [5 marks]
  16. Q4(c). c) Discuss the 12 principles of green chemistry and their importance towards sustainable development. [5 marks]
  17. Q5(a). a) Explain the importance of green solvents in chemical reactions. How do they contribute to eco-friendly chemical processes? Give two examples of green solvents and reactions. [5 marks]
  18. Q5(b). b) Explain the characteristics of green reagents. Provide examples and discuss their advantages over traditional reagents. Provide two examples of commonly used green reagents. [5 marks]
  19. Q5(c). c) Illustrate the use of ultrasound technique in green chemistry methodologies. How does it enhance reaction efficiency and reduce environmental impact? Give two examples of reactions facilitated by ultrasound. [5 marks]
  20. QQ1.. Attempt any Five parts of the following. (Unit 1 & Unit 2)
  21. QQ2.. Q2. Attempt any Two parts of the following. (Unit-3)
  22. QQ3.. Q3. Attempt any Two parts of the following. (Unit-3)
  23. QQ4.. Attempt any Two parts of the following. (Unit-4)
  24. QQ5.. Q5. Attempt any Two parts of the following. (Unit-4)