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				This section includes 1185 Mcqs, each offering curated multiple-choice questions to sharpen your UPSC IAS Exam knowledge and support exam preparation. Choose a topic below to get started.
| 301. | 
                                    In a hilly area, it was observed that the people have built their houses using stones, mud, lime and wood. These houses have two floors. On the ground floor, they provide space for animals to live and also store necessary things, on the first floor they stay. The roofs of the houses are flat and made of thick tree trunks. This hilly area is a part of | 
                            
| A. | Meghalaya | 
| B. | Himachal Pradesh | 
| C. | Jammu and Kashmir | 
| D. | Arunachal Pradesh | 
| Answer» D. Arunachal Pradesh | |
| 302. | 
                                    An ultimate source of energy stored in fossil fuels is from: | 
                            
| A. | Earth | 
| B. | Sun | 
| C. | Sea | 
| D. | Moon | 
| Answer» C. Sea | |
| 303. | 
                                    Historic convention on biological diversity which is known as earth summit held in the year | 
                            
| A. | 1986 | 
| B. | 1990 | 
| C. | 1992 | 
| D. | 1996 | 
| Answer» D. 1996 | |
| 304. | 
                                    In which of the following states is the Corbett National Park located? | 
                            
| A. | Uttarakhand | 
| B. | Tripura | 
| C. | West Bengal | 
| D. | Gujarat | 
| Answer» B. Tripura | |
| 305. | 
                                    ‘Bharat Stage Emission Standards’ refers to | 
                            
| A. | Vehicular pollution | 
| B. | Industrial pollution | 
| C. | Water pollution | 
| D. | Soil pollution | 
| Answer» B. Industrial pollution | |
| 306. | 
                                    Consider the following statements:i) Kyoto protocol came into force in the year 2005.ii) Kyoto protocol primarily deals with reducing overall greenhouse emissions.iii) Carbon dioxide is five times more effective as a greenhouse gas than methane.Which of the above statement / s is/are correct? | 
                            
| A. | i and ii | 
| B. | ii and iii | 
| C. | i only | 
| D. | iii only | 
| Answer» B. ii and iii | |
| 307. | 
                                    Air Quality Index is _______. | 
                            
| A. | An air pollutant measuring machine | 
| B. | A measuring scale to show quality of air | 
| C. | Used for measuring humidity level | 
| D. | Use for forecasting rain | 
| Answer» C. Used for measuring humidity level | |
| 308. | 
                                    Bandhavgarh is located in the _________ district of Madhya Pradesh and was declared as National Park in the Year _________. | 
                            
| A. | Sagar,1963 | 
| B. | Shahdol,1965 | 
| C. | Umaria,1968 | 
| D. | Ujjain,1967 | 
| Answer» D. Ujjain,1967 | |
| 309. | 
                                    In a pond ecosystem, the producer is | 
                            
| A. | phytoplankton | 
| B. | zooplankton | 
| C. | small fish | 
| D. | None of the above | 
| Answer» B. zooplankton | |
| 310. | 
                                    Consider the following countries:1. China2. France3. India4. Israel5. PakistanWhich among the above are Nuclear Weapons States as recognized by the Treaty on the Non-Proliferation of Nuclear Weapons, commonly known as the Nuclear Non-Proliferation Treaty (NPT)? | 
                            
| A. | 1 and 2 only | 
| B. | 1, 3, 4 and 5 only | 
| C. | 2, 4 and 5 only | 
| D. | 1, 2, 3, 4 and 5 | 
| Answer» B. 1, 3, 4 and 5 only | |
| 311. | 
                                    Air pollution can be prevented by | 
                            
| A. | planting of green trees | 
| B. | filtering industrial smoke | 
| C. | establishing hydroelectric power plant in place of thermal power station | 
| D. | All of the above | 
| Answer» E. | |
| 312. | 
                                    “Kyoto Protocol” is related to | 
                            
| A. | Air Pollution | 
| B. | Greenhouse Gases | 
| C. | Climate Change | 
| D. | Water Pollution | 
| Answer» C. Climate Change | |
| 313. | 
                                    Driving force of an ecosystem is | 
                            
| A. | Carbohydrate | 
| B. | Biomass | 
| C. | Carbon | 
| D. | Solar energy | 
| Answer» E. | |
| 314. | 
                                    In which province of China is the Huangguoshu National Park located which houses the world's largest waterfall cluster. | 
                            
| A. | Shandon | 
| B. | Guizhou | 
| C. | Yunnan | 
| D. | Jiangsu | 
| Answer» C. Yunnan | |
| 315. | 
                                    Algae are: | 
                            
| A. | Producers | 
| B. | Consumers | 
| C. | Herbivores | 
| D. | Decomposer | 
| Answer» B. Consumers | |
| 316. | 
                                    One carbon credit is accepted as equivalent to | 
                            
| A. | 100 kg of carbon | 
| B. | 100 kg of carbon dioxide | 
| C. | 1000 kg of carbon | 
| D. | 1000 kg of carbon dioxide | 
| Answer» E. | |
| 317. | 
                                    In which State is the Similipal Tiger Reserve Situated? | 
                            
| A. | Odisha | 
| B. | Maharashtra | 
| C. | Andhra Pradesh | 
| D. | Madhya Pradesh | 
| Answer» B. Maharashtra | |
| 318. | 
                                    Identify the Environmental friendly method among the following: | 
                            
| A. | Usage of poly chlorinated biphenyls as cleansing solvent | 
| B. | Usage of chlorine for bleaching paper | 
| C. | Usage of tetra chloro ethane for dry cleaning | 
| D. | Usage of H2O2 for bleaching cloths. | 
| Answer» E. | |
| 319. | 
                                    Forest fires and volcanic eruptions add one of the major pollutants into the air. This pollutant is: | 
                            
| A. | Chlorofluorocarbon | 
| B. | Hydrogen sulphide | 
| C. | Particulate matter | 
| D. | Hydrocarbons | 
| Answer» D. Hydrocarbons | |
| 320. | 
                                    Any undesirable change in physical, chemical or biological characteristics of air, land, water or soil is called? | 
                            
| A. | Greenhouse effect | 
| B. | Solid wastes | 
| C. | Pollution | 
| D. | Deforestation | 
| Answer» D. Deforestation | |
| 321. | 
                                    Kaziranga National Park is located at: | 
                            
| A. | Assam | 
| B. | Uttarakhand | 
| C. | Odissa | 
| D. | Madhya Pradesh | 
| Answer» B. Uttarakhand | |
| 322. | 
                                    Near which city has the Uttar Pradesh State Cabinet approved India’s first Blackbuck Conservation Reserve? | 
                            
| A. | Allahabad | 
| B. | Gorakhpur | 
| C. | Meerut | 
| D. | Moradabad | 
| Answer» B. Gorakhpur | |
| 323. | 
                                    Arrange the following international initiatives towards sustainable development in sequential order (chronological) and select the correct answer using the code given belowa. The Brundtland Commissionb. Stockholm Conferencec. UN Decade of Education for Sustainable Developmentd. Rio+20 or Rio Earth Summit | 
                            
| A. | b a c d | 
| B. | b c d a | 
| C. | c a b d | 
| D. | b d a c | 
| Answer» B. b c d a | |
| 324. | 
                                    Energy flow in the food web is | 
                            
| A. | unidirectional | 
| B. | multidirectional | 
| C. | Both (1) and (2) | 
| D. | None of the above | 
| Answer» C. Both (1) and (2) | |
| 325. | 
                                    In which of the following states is the Simlipal bio-reserve located? | 
                            
| A. | Himachal Pradesh | 
| B. | Punjab | 
| C. | Uttarakhand | 
| D. | Odisha | 
| Answer» E. | |
| 326. | 
                                    Name the first wildlife reserve in India to get an Official mascot. | 
                            
| A. | Ranthambore National Park | 
| B. | Corbett National Park | 
| C. | Kanha Tiger Reserve | 
| D. | Sariska National Park | 
| Answer» D. Sariska National Park | |
| 327. | 
                                    Home to the snow leopard, the Hemis National Park, is located in: | 
                            
| A. | Ladakh | 
| B. | Arunachal Pradesh | 
| C. | Lakshadweep | 
| D. | Himachal Pradesh | 
| Answer» B. Arunachal Pradesh | |
| 328. | 
                                    Human activities in the recent past have caused the increased concentration of carbon dioxide in the atmosphere, but a lot of it does not remain in the lower atmosphere because of 1. its escape into the outer stratosphere.2. the photosynthesis by phytoplankton in the oceans.3. the trapping of air in the polar ice caps.Which of the statements given above is/are correct? | 
                            
| A. | 1 and 2 | 
| B. | 2 only | 
| C. | 2 and 3 | 
| D. | 3 only | 
| Answer» C. 2 and 3 | |
| 329. | 
                                    How many agreements are there in Agenda - 21? | 
                            
| A. | 4 | 
| B. | 5 | 
| C. | 6 | 
| D. | 7 | 
| Answer» B. 5 | |
| 330. | 
                                    Greenhouse gas, which is present in the highest quantity in the atmosphere, is | 
                            
| A. | Propane | 
| B. | Ethane | 
| C. | Carbon dioxide | 
| D. | Methane | 
| Answer» D. Methane | |
| 331. | 
                                    An ecosystem consists of: | 
                            
| A. | Chemical and physical components | 
| B. | Biotic and abiotic components | 
| C. | Physical and social components | 
| D. | Biotic and antibiotic components | 
| Answer» C. Physical and social components | |
| 332. | 
                                    Biotic component of environment includes | 
                            
| A. | Land | 
| B. | Air | 
| C. | Plants | 
| D. | Water | 
| Answer» D. Water | |
| 333. | 
                                    Consider the following pairs:International agreement/set upSubject1. Alma-Ata DeclarationHealthcare of the people2. Hague ConventionBiological and chemical weapons3. Talanoa DialogueGlobal climate change4. Under2 CoalitionChild rights Which of the pairs given above is/are correctly matched? | 
                            
| A. | 1 and 2 only | 
| B. | 4 only | 
| C. | 1 and 3 only | 
| D. | 2, 3 and 4 only | 
| Answer» D. 2, 3 and 4 only | |
| 334. | 
                                    Chlorofluorocarbons are widely used in: | 
                            
| A. | Refrigerators | 
| B. | Microwave ovens | 
| C. | Air conditioners | 
| D. | All of the above | 
| Answer» E. | |
| 335. | 
                                    On July 6, 2018, the Government of India declared the 438 sq.km. of the area around Mudumalai Tiger Reserve (MTR) as an Eco-Sensitive Zone (ESZ). The Mudumalai Tiger Reserve is located in | 
                            
| A. | Andaman and Nicobar islands | 
| B. | Telangana | 
| C. | Andhra Pradesh | 
| D. | Tamil Nadu | 
| Answer» E. | |
| 336. | 
                                    Nauradehi Sanctuary is located in which district of Madhya Pradesh? | 
                            
| A. | Baghelkhand | 
| B. | Gwaliyar | 
| C. | Sagar | 
| D. | Rewa | 
| Answer» D. Rewa | |
| 337. | 
                                    A specific function of light energy in the process of photosynthesis is to ________. | 
                            
| A. | activate chlorophyll | 
| B. | formation of oxygen | 
| C. | absorb water | 
| D. | reduce CO2 | 
| Answer» B. formation of oxygen | |
| 338. | 
                                    Match List I with List Il and select the correct answer using the code given below the Lists :List I(National Park)List II (Location in map)A. CorbettB. Neora ValleyC. BetlaD. Kanha | 
                            
| A. | A - 2, B - 1, C - 3, D - 4 | 
| B. | A 2, B - 1, C - 1, D - 4 | 
| C. | A - 4, B - 1, C - 3, D - 2 | 
| D. | A - 4, B - 3, C - 1, D - 2 | 
| Answer» E. | |
| 339. | 
                                    ‘Minamata disease’ was caused by eating fish which have high levels of | 
                            
| A. | Arsenic | 
| B. | Mercury | 
| C. | Cadmium | 
| D. | All of the above | 
| Answer» C. Cadmium | |
| 340. | 
                                    In an ecosystem, energy | 
                            
| A. | is released | 
| B. | is absorbed | 
| C. | flows | 
| D. | None of the above | 
| Answer» D. None of the above | |
| 341. | 
                                    Earthworms are considered friends of the farmers. Select from the following the correct reasons for the same:A. Earthworms eat the dead leaves and plants and their droppings fertilise the soil.B. Earthworms eat the weeds and save the main crop.C. Earthworms soften the soil by digging underneath.D. The tunnels made by the earthworms provide easy passage to air and water into the soil. | 
                            
| A. | B, C and D | 
| B. | C, D and A | 
| C. | A and C only | 
| D. | A, B and C | 
| Answer» C. A and C only | |
| 342. | 
                                    A ______ is a collection of different ecosystems which share similar climatic conditions. | 
                            
| A. | reef | 
| B. | flora | 
| C. | biome | 
| D. | lagoon | 
| Answer» D. lagoon | |
| 343. | 
                                    Match List - I (National Park) with List - II (Important Wildlife) and select the correct answer using the codes given below the lists:List - IList - II(a) Gir national park(i) Elephant(b) Ranthambore(ii) Indian Lion(c) Kaziranga(iii) Tiger(d) Bandipur(iv) One - horned Rhino(e) Kanchenjunga park(v) Musk deer | 
                            
| A. | (a) - (v), (b) - (iii), (c) - (iv), (d) - (ii), e - (i) | 
| B. | (a) - (ii), (b) - (iii), (c) - (iv), (d) - (i), e - (v) | 
| C. | (a) - (ii), (b) - (iii), (c) - (v), (d) - (iv), e - (i) | 
| D. | (a) - (iii), (b) - (v), (c) - (iv), (d) - (ii), e - (i) | 
| Answer» C. (a) - (ii), (b) - (iii), (c) - (v), (d) - (iv), e - (i) | |
| 344. | 
                                    _________ is the breaking up of the rocks on the earth's surface. | 
                            
| A. | Erosion | 
| B. | Weathering | 
| C. | Attrition | 
| D. | Abrasion | 
| Answer» C. Attrition | |
| 345. | 
                                    How does air pollution affect living organisms?1. Sulphur dioxide irritates the respiratory tissues.2. Nitrogen oxides, especially NO2, can irritate the lungs.3. Suspended particles in the air aggravate our respiratory tract, leading to bronchitis and asthma.4. Many volatile organic compounds and toxic particulates can cause mutations, reproductive problems or cancer.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, 2, 3 and 4 | 
| Answer» E. | |
| 346. | 
                                    Kanha National Park is located in ______ | 
                            
| A. | Uttarakhand | 
| B. | Himachal Pradesh | 
| C. | Madhya Pradesh | 
| D. | Uttar Pradesh | 
| Answer» D. Uttar Pradesh | |
| 347. | 
                                    Arrange the following events in chronological order and select the correct answer from the codes given below :I. Rio Earth SummitII. Publication of Brundtland Commission ReportIII. Enforcement of Montreal ProtocolIV. Publication of 'The Limit to Growth' Report | 
                            
| A. | I, IV, III, II | 
| B. | IV, II, III, I | 
| C. | IV, III, II, I | 
| D. | IV, I, III, II | 
| Answer» C. IV, III, II, I | |
| 348. | 
                                    Gir National Park is known for its ______. | 
                            
| A. | Orangutan | 
| B. | Cherry blossom | 
| C. | Red silk cotton | 
| D. | Asiatic Lions | 
| Answer» E. | |
| 349. | 
                                    Examine the following statements:A. A biodiversity hotspot is a biogeographical region, which is biologically diverse.B. They have high concentration of endemic species.C. Western ghats in India is a biodiversity hotspot.Choose the correct answer/statements: | 
                            
| A. | A & C only | 
| B. | B & C only | 
| C. | A, B & C | 
| D. | A & B only | 
| Answer» D. A & B only | |
| 350. | 
                                    ______species are NOT in the IUCN classification of threatened species. | 
                            
| A. | Harmful | 
| B. | Extinct | 
| C. | Vulnerable | 
| D. | Endangered | 
| Answer» B. Extinct | |