Q48moderateAbsolute Qualifier
Which of the following are the reasons/factors for exposure to benzene pollution ?
1. Automobile exhaust
2. Tobacco smoke
3. Wood burning
4. Using varnished wooden furniture
5. Using products made of polyurethane
Select the correct answer using the code given below :
(a) 1, 2 and 3 only
(b) 2 and 4 only
(c) 1, 3 and 4 only
(d) 1, 2, 3, 4 and 5
Answer: (d)
Trap: Absolute Qualifier
Statements 4 and 5 are designed to create doubt. Students may not know that varnished furniture releases benzene (varnish contains benzene as solvent) and polyurethane products also off-gas benzene. Benzene is a common industrial solvent found in many consumer products. The trap is making students think benzene exposure is limited to obvious combustion sources.
Q72moderatePartial Truth
With reference to Indian elephants, consider the following statements :
1. The leader of an elephant group is a female.
2. The maximum gestation period can be 22 months.
3. An elephant can normally go on calving till the age of 40 years only.
4. Among the States in India, the highest elephant population is in Kerala.
Which of the statements given above is/are correct ?
(a) 1 and 2 only
(b) 2 and 4 only
(c) 3 only
(d) 1, 3 and 4 only
Answer: (a)
Trap: Partial Truth
Statement 4 is a strong trap - many students think Kerala has the most elephants due to temple elephants and cultural association. But Karnataka has the highest elephant population in India. Statement 3 is also false - elephants can calve well beyond 40 years (up to 60+ years). These trap students' common assumptions about elephants.
Q74moderateSimilar Sounding
With reference to India's biodiversity, Ceylon frogmouth, Coppersmith barbet, Gray-chinned minivet and White-throated redstart are
(a) Birds
(b) Primates
(c) Reptiles
(d) Amphibians
Answer: (a)
Trap: Similar Sounding
The name 'Ceylon frogmouth' can trick students into thinking it's an amphibian (frog-related). 'Redstart' might not immediately suggest a bird. However, all four are birds: frogmouths are nocturnal birds, barbets are colorful birds, minivets are passerines, and redstarts are small birds.
Q75moderateSimilar Sounding
Which one of the following protected areas is well-known for the conservation of a sub-species of the Indian swamp deer (Barasingha) that thrives well on hard ground and is exclusively graminivorous ?
(a) Kanha National Park
(b) Manas National Park
(c) Mudumalai Wildlife Sanctuary
(d) Tal Chhapar Wildlife Sanctuary
Answer: (a)
Trap: Similar Sounding
Option (d) Tal Chhapar is a trap because it's known for the Blackbuck, not Barasingha. Option (b) Manas has diverse wildlife but not the hard-ground Barasingha. Kanha National Park is famous for saving the hard-ground sub-species of Barasingha (Rucervus duvaucelii branderi) from near-extinction. The key clue is 'hard ground' - most Barasingha are swamp-dwellers, but Kanha's subspecies adapted to hard ground.
Q77moderateDistractor Pairing
Which of the following are the most likely places to find the musk deer in its natural habitat ?
1. Askot Wildlife Sanctuary
2. Gangotri National Park
3. Kishanpur Wildlife Sanctuary
4. Manas National Park
Select the correct answer using the code given below :
(a) 1 and 2 only
(b) 2 and 3 only
(c) 3 and 4 only
(d) 1 and 4 only
Answer: (a)
Trap: Distractor Pairing
Options 3 and 4 are distractors. Musk deer inhabit HIGH ALTITUDE alpine/subalpine forests (above 2,500m). Kishanpur Wildlife Sanctuary (3) is in Terai region of UP (lowland) - NOT musk deer habitat. Manas NP (4) is in Assam lowlands. Askot WLS and Gangotri NP are both high-altitude areas in Uttarakhand where musk deer are found.
Q78moderateCommon Misconception
In rural road construction, the use of which of the following is preferred for ensuring environmental sustainability or to reduce carbon footprint ?
1. Copper slag
2. Cold mix asphalt technology
3. Geotextiles
4. Hot mix asphalt technology
5. Portland cement
Select the correct answer using the code given below :
(a) 1, 2 and 3 only
(b) 2, 3 and 4 only
(c) 4 and 5 only
(d) 1 and 5 only
Answer: (a)
Trap: Common Misconception
Items 4 and 5 are traps. Hot mix asphalt (4) requires HIGH temperatures (150-170°C), consuming more energy and increasing carbon footprint - the opposite of sustainability. Portland cement (5) production is one of the LARGEST industrial CO2 emitters. Cold mix asphalt (2) works at ambient temperature (low energy), copper slag (1) uses industrial waste, and geotextiles (3) reduce material use.
Q79easy
Consider the following statements :
1. Coal ash contains arsenic, lead and mercury.
2. Coal-fired power plants release sulphur dioxide and oxides of nitrogen into the environment.
3. High ash content is observed in Indian coal.
Which of the statements given above is/are correct ?
(a) 1 only
(b) 2 and 3 only
(c) 3 only
(d) 1, 2 and 3
Answer: (d)
Q80moderateAbsolute Qualifier
What is the use of biochar in farming ?
1. Biochar can be used as a part of the growing medium in vertical farming.
2. When biochar is a part of the growing medium, it promotes the growth of nitrogen-fixing microorganisms.
3. When biochar is a part of the growing medium, it enables the growing medium to retain water for longer time.
Which of the statements given above is/are correct ?
(a) 1 and 2 only
(b) 2 only
(c) 1 and 3 only
(d) 1, 2 and 3
Answer: (d)
Trap: Absolute Qualifier
Statement 1 about vertical farming may surprise students who associate biochar only with traditional soil-based farming. However, biochar can indeed be used in vertical farming growing media. All three benefits of biochar are well-documented: it can be used in various growing systems (1), promotes beneficial microorganisms including nitrogen-fixers (2), and has excellent water retention properties (3).
Q81moderateAbsolute Qualifier
If a particular plant species is placed under Schedule VI of The Wildlife Protection Act, 1972, what is the implication ?
(a) A licence is required to cultivate that plant.
(b) Such a plant cannot be cultivated under any circumstances.
(c) It is a Genetically Modified crop plant.
(d) Such a plant is invasive and harmful to the ecosystem.
Answer: (a)
Trap: Absolute Qualifier
Option (b) uses 'under any circumstances' which is too absolute. Schedule VI plants CAN be cultivated but require a licence/permit. The Act regulates but does not completely ban cultivation. Options (c) and (d) are unrelated to wildlife protection legislation.
Q83moderateAbsolute Qualifier
What is/are the advantage/advantages of zero tillage in agriculture ?
1. Sowing of wheat is possible without burning the residue of previous crop.
2. Without the need for nursery of rice saplings, direct planting of paddy seeds in the wet soil is possible.
3. Carbon sequestration in the soil is possible.
Select the correct answer using the code given below :
(a) 1 and 2 only
(b) 2 and 3 only
(c) 3 only
(d) 1, 2 and 3
Answer: (d)
Trap: Absolute Qualifier
Statement 2 might confuse students who think zero tillage only applies to wheat after rice. However, zero tillage/direct seeding of rice (DSR) is also practiced - paddy seeds can be directly planted without transplanting nursery saplings. All three statements describe genuine advantages of zero tillage practices.
Q84easyAbsolute Qualifier
According to India's National Policy on Biofuels, which of the following can be used as raw materials for the production of biofuels ?
1. Cassava
2. Damaged wheat grains
3. Groundnut seeds
4. Horse gram
5. Rotten potatoes
6. Sugar beet
Select the correct answer using the code given below :
(a) 1, 2, 5 and 6 only
(b) 1, 3, 4 and 6 only
(c) 2, 3, 4 and 5 only
(d) 1, 2, 3, 4, 5 and 6
Answer: (a)
Trap: Absolute Qualifier
The policy allows surplus/damaged food grains and non-food crops for biofuels, but specifically EXCLUDES food crops that may cause food vs fuel conflict. Groundnut seeds (3) are edible oilseeds (food crop - excluded). Horse gram (4) is a food pulse (excluded). Cassava, damaged wheat, rotten potatoes are waste/surplus, and sugar beet is a non-food biofuel crop. Students may think all agricultural products qualify.
Q85easy
Which one of the following statements best describes the term 'Social Cost of Carbon' ? It is a measure, in monetary value, of the
(a) long-term damage done by a tonne of CO₂ emissions in a given year.
(b) requirement of fossil fuels for a country to provide goods and services to its citizens, based on the burning of those fuels.
(c) efforts put in by a climate refugee to adapt to live in a new place.
(d) contribution of an individual person to the carbon footprint on the planet Earth.
Answer: (a)
Q90moderateAbsolute Qualifier
In the context of India, which of the following is/are considered to be practice(s) of eco-friendly agriculture ?
1. Crop diversification
2. Legume intensification
3. Tensiometer use
4. Vertical farming
Select the correct answer using the code given below :
(a) 1, 2 and 3 only
(b) 3 only
(c) 4 only
(d) 1, 2, 3 and 4
Answer: (d)
Trap: Absolute Qualifier
Students may not know what a tensiometer is (measures soil moisture tension to optimize irrigation) and may doubt vertical farming as eco-friendly (thinking it's energy-intensive). However, crop diversification reduces monoculture risks, legume intensification fixes nitrogen naturally, tensiometers optimize water use, and vertical farming reduces land use and transportation. All are eco-friendly.
Q95moderateCommon Misconception
With reference to India's Desert National Park, which of the following statements are correct ?
1. It is spread over two districts.
2. There is no human habitation inside the Park.
3. It is one of the natural habitats of Great Indian Bustard.
Select the correct answer using the code given below :
(a) 1 and 2 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3
Answer: (c)
Trap: Common Misconception
Statement 2 is the trap. Students may assume national parks have no human habitation. However, Desert National Park DOES have human settlements inside it - several villages exist within the park boundaries. This is unlike the common perception of national parks being free of human habitation. Many Indian national parks have inhabited villages within them.
Q100moderateCommon Misconception
Among the following Tiger Reserves, which one has the largest area under "Critical Tiger Habitat" ?
(a) Corbett
(b) Ranthambore
(c) Nagarjunsagar-Srisailam
(d) Sunderbans
Answer: (c)
Trap: Common Misconception
Options (a) Corbett and (b) Ranthambore are the most famous tiger reserves and students may assume they are the largest. Option (d) Sunderbans may also seem large due to its vast mangrove area. However, Nagarjunsagar-Srisailam Tiger Reserve in Andhra Pradesh/Telangana is the LARGEST tiger reserve in India (over 3,500 sq km) and has the largest Critical Tiger Habitat area.