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#	Question	Subject and topic	Difficulty
101	A river stretch receiving untreated sewage will usually show:	Environmental Studies Water pollution	Easy
102	The standard BOD test measures oxygen consumed by microbes over:	Environmental Studies Water pollution	Medium
103	A 10 mL water sample is diluted to 300 mL. DO falls from 8.0 mg/L to 5.0 mg/L in the BOD test. The BOD of the…	Environmental Studies Water pollution	Hard
104	For the same water sample, COD is generally higher than BOD because:	Environmental Studies Water pollution	Medium
105	The presence of coliform bacteria such as E. coli in drinking water indicates:	Environmental Studies Water pollution	Easy
106	The two nutrients mainly responsible for eutrophication of lakes are:	Environmental Studies Lakes and eutrophication	Easy
107	The warm upper layer of a thermally stratified lake is called the:	Environmental Studies Lakes and eutrophication	Medium
108	In a eutrophic lake, fish die mainly because:	Environmental Studies Lakes and eutrophication	Medium
109	Compared with a eutrophic lake, an oligotrophic lake typically has:	Environmental Studies Lakes and eutrophication	Easy
110	Lakes in cold regions freeze from the top down and aquatic life survives below because:	Environmental Studies Lakes and eutrophication	Hard
111	In a jar (sedimentation) test, which soil fraction settles to the bottom first?	Environmental Studies Soil pollution	Easy
112	Which soil type has the highest water-holding capacity?	Environmental Studies Soil pollution	Easy
113	100 g of oven-dry soil weighs 140 g after it is soaked and allowed to drain. Its water-holding capacity is:	Environmental Studies Soil pollution	Medium
114	Which material is commonly added to correct acidic soil?	Environmental Studies Soil pollution	Medium
115	The polluted liquid that seeps out of a waste dump and can contaminate soil and groundwater is called:	Environmental Studies Soil pollution	Hard
116	Which of these is a push factor for rural-to-urban migration?	Environmental Studies Urbanisation	Easy
117	According to Census 2011, roughly what share of India’s population lived in urban areas?	Environmental Studies Urbanisation	Medium
118	The “urban heat island” effect means that:	Environmental Studies Urbanisation	Easy
119	For a settlement to be a census town in India, at least what share of its male main workers must be in non-ag…	Environmental Studies Urbanisation	Hard
120	The UN World Urbanization Prospects 2018 projected that by 2050 the share of the world’s population living in…	Environmental Studies Urbanisation	Medium
121	The 1972 report The Limits to Growth, which warned that endless growth on a finite planet could lead to colla…	Environmental Studies Critique of conventional development	Medium
122	Fairness in sharing resources between people living today and those not yet born is called:	Environmental Studies Critique of conventional development	Easy
123	E. F. Schumacher’s book Small is Beautiful (1973) argued for:	Environmental Studies Critique of conventional development	Medium
124	An economy based on “take–make–dispose” is called a:	Environmental Studies Critique of conventional development	Easy
125	Which is a key criticism of using GDP growth alone as the measure of development?	Environmental Studies Critique of conventional development	Hard
126	The Gandhian term “Antyodaya” refers to:	Environmental Studies Gandhian approach to development	Easy
127	“Sarvodaya” was the title Gandhi gave to his paraphrase of a book by:	Environmental Studies Gandhian approach to development	Medium
128	Which constitutional amendment gave panchayats constitutional status in India?	Environmental Studies Gandhian approach to development	Easy
129	Gandhi’s support for khadi and the charkha was based mainly on the idea that:	Environmental Studies Gandhian approach to development	Medium
130	The Gandhian “talisman” asks a decision-maker to:	Environmental Studies Gandhian approach to development	Hard
131	Separating household waste into wet, dry and hazardous categories at home is called:	Environmental Studies Urban environmental planning	Easy
132	Composting with the help of earthworms is called:	Environmental Studies Urban environmental planning	Easy
133	A city’s groundwater table is falling fast. Which measure is a low-cost way to recharge it?	Environmental Studies Urban environmental planning	Medium
134	Which state made rooftop rainwater harvesting compulsory for buildings in 2003?	Environmental Studies Urban environmental planning	Hard
135	Traditional features such as courtyards, thick walls and jaalis in Indian buildings mainly help to:	Environmental Studies Urban environmental planning	Medium
136	Which city is best known for pioneering Bus Rapid Transit and a “Green Exchange” of recyclable waste for food…	Environmental Studies New urbanism and case studies	Easy
137	The Cochabamba “Water War” of 2000 was a protest against:	Environmental Studies New urbanism and case studies	Medium
138	The TransMilenio bus system and the Sunday Ciclovía are associated with:	Environmental Studies New urbanism and case studies	Easy
139	Cuba expanded urban organic farming such as organopónicos mainly because:	Environmental Studies New urbanism and case studies	Medium
140	Which of these is a principle of smart growth?	Environmental Studies New urbanism and case studies	Hard
141	Under the Permanent Settlement of 1793, land revenue was fixed and collected through:	Environmental Studies History of Indian agriculture	Easy
142	The Ryotwari system, introduced in parts of Madras and Bombay, differed from the Permanent Settlement because…	Environmental Studies History of Indian agriculture	Medium
143	Gandhi's Champaran Satyagraha of 1917 supported peasants who were being forced to grow:	Environmental Studies History of Indian agriculture	Easy
144	Which feature best describes most pre-colonial Indian villages?	Environmental Studies History of Indian agriculture	Medium
145	A historian argues that colonial policy made Indian peasants more vulnerable to famine. Which change best sup…	Environmental Studies History of Indian agriculture	Hard
146	An irrigation project with a culturable command area of 6,000 hectares is classified in India as:	Environmental Studies Irrigation systems	Easy
147	The khadin system of western Rajasthan works by:	Environmental Studies Irrigation systems	Medium
148	Rajendra Singh and Tarun Bharat Sangh are known for reviving which traditional structure in Alwar?	Environmental Studies Irrigation systems	Easy
149	A farmer in a semi-arid area wants to grow pomegranates with the least water loss. Which method is most suita…	Environmental Studies Irrigation systems	Medium
150	Large canal command areas in north-west India have developed white salt crusts on fields. The most likely cau…	Environmental Studies Irrigation systems	Hard