90 PERCENT QUESTION TOPICS FROM OUR TEST SERIES COMPILATION
Subject distribution (approximate).
Pollution and environmental health takes the largest share, about 24 to 28 questions. It covers air pollutants (radon, cyclone separators, photochemical smog, ozone, cigarette smoke, stratospheric versus tropospheric ozone, indoor pollutants), water pollution (BOD, blue baby syndrome, hardness, thermal pollution, acid mine drainage, sewage-tolerant species, treatment levels), noise limits, radioisotopes, toxicants (arsenic, DDT, teratogens) and plant damage from pollutants.
Ecology, biodiversity and conservation is about 18 to 22 questions: species diversity and the Shannon index, benthos, ecotone, ecological pyramids, keystone species, hotspots, logistic growth, GPP and NPP, succession and ecesis, ex-situ conservation in Assam, IUCN status of the rhino, national parks matched with species, Silent Valley, Sundarbans, orchids and epiphytes, and the loss of biodiversity.
Climate change and atmosphere is about 14 to 16 questions: IPCC, the Paris Agreement, ENSO and El Niño, ocean acidification, coral bleaching, global warming potential, mitigation measures, the greenhouse effect, solar constant, the Hadley cell, lapse rate, virtual temperature, socio-economic impacts and the ozone layer.
Policy, law, institutions and events is about 12 to 14 questions: constitutional provisions, Brundtland report, the Umbrella Act, WHO, Rajendra Pachauri, Narmada Bachao Andolan, Project Hangul, Rachel Carson, Bharat Stage VI, Extended Producer Responsibility, biomedical waste categories, Bhopal gas tragedy, the Cauvery dispute, and conventions (Basel, Ramsar, Cartagena, Bonn).
Soil, water and nutrient cycles is about 8 to 10 questions: contour cultivation, soil horizons, soil degradation in Assam, soil pH, organic wetland soils, decomposers, nitrogen mineralisation, phosphorus guano, aquifers and nutrient roles (the soil conservation context of the post).
Waste management and energy is about 8 to 10 questions: landfill methane, deep well injection, incineration, CNG composition, calorific values, tidal power, and organic carbon forms.
Remote sensing, GIS and statistics is a small block of about 6 to 8 questions: Landsat history, remote sensing definition, DEM and raster models, the Poisson distribution, sampling types and wind speed instruments.
Disaster management takes about 2 to 3 questions: the pre-disaster phases and the 2004 tsunami.
Recurring themes.
- Climate and the oceans appear in many forms (ocean acidification, coral bleaching, El Niño, the Paris Agreement), so ocean-climate links are high-yield.
- Pollution questions repeatedly ask for the specific agent (radon, nitrates, benzo(a)pyrene, DDT in fat tissue, strontium-90).
- Institutions, people and treaties come as simple match or identify questions.
- Soil and water quality appear throughout, in line with the post’s soil conservation focus.
Difficulty pattern. Mostly easy to moderate. Quick marks include Silent Spring, the ozone layer, methane from landfills and Bhopal’s methyl isocyanate.
The slower items are Q92 (virtual temperature needs a formula and arithmetic), Q9 (Poisson standard deviation is the square root of the mean), the calorific value sequence (Q94) and the match-type questions that need two or three confirmed pairs.
Preparation takeaways. Prioritise pollution types and their specific agents, ecology basics (diversity indices, pyramids, keystone species), climate change and ocean impacts, and the main environmental acts, conventions and treaties. Learn the national parks and the species they are known for, and the Assam conservation cases. Revise the formulas for the Poisson distribution and virtual temperature.
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