NBC 1053 CreditsSemester 1 • VBSPU
Environment and Ecology
External Exam70 Marks
Internal / TA30 Marks
Total Scope5 Units
Passing Marks40% Minimum
🎯 "Kaise Padhna Hai" — Scoring Strategy (Target: 85%+)
🔥 High-Yield Scoring Units: Units 1, 2, 3, 4
- Draw Food Web diagrams and Ecological Pyramids (Number, Biomass, Energy) in Unit 1.
- Diagram the Carbon & Nitrogen Cycles showing fixation, nitrification, and assimilation.
- Explain the chemical reactions of Acid Rain (SO2 -> H2SO3 and NO2 -> HNO3) and Ozone depletion via CFCs.
- Highlight key legislation: Environmental Protection Act (EPA) 1986 and 3R Waste Principle.
Common Mistakes to Avoid in Exam:
- • Drawing an inverted Energy Pyramid — the Pyramid of Energy is ALWAYS upright (10% law)!
- • Confusing BOD (Biochemical Oxygen Demand) with COD (Chemical Oxygen Demand).
- • Calling CO2 an ozone-depleting substance — CFCs (Chlorofluorocarbons) destroy ozone, while CO2 causes global warming.
Complete Unit-wise Syllabus & Notes (Units 1 to 5)
NBC 105 Self-Check Quiz
Test your mastery of core exam concepts
1.Which ecological pyramid is ALWAYS upright in any natural ecosystem?
2.What is the pH threshold below which precipitation is classified as Acid Rain?
3.Which international protocol was enacted in 1987 to phase out Chlorofluorocarbons (CFCs)?
4.High Biochemical Oxygen Demand (BOD) in a river indicates:
5.In which year was the comprehensive Environmental Protection Act passed in India?
Top Viva Voce Questions for NBC 105
1
Why is the Pyramid of Energy always upright?
2
Which bacteria is responsible for symbiotic nitrogen fixation in legumes?
3
What is the difference between BOD and COD?
4
Which international treaty successfully phased out Ozone Depleting Substances (CFCs)?
5