Environmental Science and Green Chemistry — Minor 2026 question paper

Paper details

• Subject: Environmental Science and Green Chemistry (BSM-140)
• Branch: Internet of Things
• Semester: 2
• Exam: Minor 2026
• Questions: 12

Questions asked in Environmental Science and Green Chemistry Minor 2026

1. Q1. Attempt any two parts of the following
2. Q1(a). Draw the molecular orbital (MO) diagrams for HF and $ O_{2}^{2-} $ molecules/ions. Based on the diagrams, write their electronic configurations, calculate the bond orders, and predict their magnetic behavior. [4 marks]
3. Q1(b). Define molarity and normality. i) Calculate the molarity of an aqueous solution of ethanol if the mole fraction of ethanol in the solution is 0.040. ii) The concentration of glucose ( $ C_{6}H_{12}O_{6} $) in normal blood is approximately 90 mg per 100 mL. Calculate the molarity of glucose in blood. [4 marks]
4. Q1(c). Explain the following environmental issues with their causes and harmful effects: (i) Global Warming and Greenhouse Effect (ii) Ozone Layer Depletion [4 marks]
5. Q2. Attempt any Two parts of the following. (Unit 1)
6. Q2(a). Explain the reaction mechanism of the Beckmann rearrangement reaction with suitable examples. [3 marks]
7. Q2(b). Discuss in detail the elimination reactions in organic chemistry. Explain the complete mechanism of both E1 (unimolecular elimination) and E2 (bimolecular elimination) reactions with suitable examples. Highlight the differences between their reaction conditions, intermediates, and kinetics. [3 marks]
8. Q2(c). Discuss the concept of hydrogen bonding in detail. Differentiate between intramolecular and intermolecular hydrogen bonding with the help of examples. Explain why p-nitrophenol is more soluble in water than o-nitrophenol. [3 marks]
9. Q3. Attempt any Two parts of the following.
10. Q3(a). Explain the hardness of water. Describe in detail any one of the following processes for softening hard water giving diagrams. Lime-soda process OR Zeolite process (any one) [3 marks]
11. Q3(b). Explain the Ion Exchange Process for water softening. Write its advantages and disadvantages. [3 marks]
12. Q3(c). Discuss the awareness and policy measures for water conservation and outline the key parameters of water quality as prescribed by WHO standards. Oi. With a neat diagram, describe the different layers of atmosphere and their characteristics. [3 marks]