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Environmental Science and Green Chemistry — Minor 2025 question paper

MMMUT Civil Engineering previous year question paper for Environmental Science and Green Chemistry (BSH-190), semester 2, Minor 2025. All 12 questions are listed below, each with a written answer on Nexsus.

Paper details

  • Subject: Environmental Science and Green Chemistry (BSH-190)
  • Branch: Civil Engineering
  • Semester: 2
  • Exam: Minor 2025
  • Questions: 12

Questions asked in Environmental Science and Green Chemistry Minor 2025

  1. Q1. Attempt any five parts.
  2. Q1(a). Draw the molecular orbital (MO) diagrams for NO and O2 molecules. Also write their electronic configurations and calculate the bond order. [4 marks]
  3. Q1(b). Explain the reaction mechanism of (I) Cannizzaro Reaction (II) Hofmann Rearrangement [4 marks]
  4. Q1(c). Write a short note on acid rain and its effect on environment. [4 marks]
  5. Q2. Attempt any Two parts of the following. (Unit 1)
  6. Q2(a). Define Normality and Molarity of the solution. Calculate the molarity of a solution containing 5 gm of NaCl in 250 mL of the solution. [3 marks]
  7. Q2(b). What is nucleophilic substitution reaction? Explain the mechanism for SN1 and SN2 reaction with examples. Also differentiate between SN1 and SN2 reaction. [3 marks]
  8. Q2(c). Write a note on Inductive effect. Compare the stability of 1°, 2°, and 3° carbocation on the basis of inductive effect. Explain the reason. [3 marks]
  9. Q3. Attempt any Two parts of the following. (Unit 2)
  10. Q3(a). Differentiate between soft and hard water. Explain the zeolite process for softening of water. [3 marks]
  11. Q3(b). Explain lime soda process for water softening. Write its advantages and disadvantages. [3 marks]
  12. Q3(c). What is ozone layer depletion? Explain the effect and causes of ozone layer depletion. [3 marks]