EST Unit 1 PDF

# Environmental Studies (MSBTE-SEM 5) ## Multiple Choice Questions **Q. 1** All the environment crisis are solely due to **(i) Population (ii) Water quality (iii) Air quality (iv) None of the above** **Ans:** (i) **Q. 2** Ozone depletion is harmful to **(i) Skin (ii) Digestion (iii) Reproduction...

# Environmental Studies (MSBTE-SEM 5) ## Multiple Choice Questions **Q. 1** All the environment crisis are solely due to **(i) Population (ii) Water quality (iii) Air quality (iv) None of the above** **Ans:** (i) **Q. 2** Ozone depletion is harmful to **(i) Skin (ii) Digestion (iii) Reproduction (iv) None of the above** **Ans**: (i) **Q. 3** Lithosphere, hydrosphere, atmosphere together is called **(i) Biosphere (ii) Environment (iii) Stratosphere (iv) None of the above** **Ans:** (i) **Q. 4** Wild life sanctuaries are developed to protect wild species of **(i) Birds (ii) Animals (iii) Tribals (iv) All of the above** **Ans:** (i) **Q. 5** Wind speed reaches 100 km per hour or more during. **(i) Storm (ii) Tsunami (iii) Cyclone (iv) Wind mill** **Ans:** (iii) **Q. 6** Acid rain occurs due to dissolution of ____ in rain water **(i) Gases (ii) Particles (iii) Smoke (iv) Soot** **Ans:** (i) **Q. 7** Environmental education emphasizes on **(i) Air (ii) Water (iii) Environmental issues (iv) None of the above** **Ans:** (iii) **Q. 8** Aesthetic value of environment is enhanced by **(i) Dry plants (ii) Green plants (iii) Plants with colourful flowers (iv) None of the above** **Ans:** (iii) **Q. 9** Reduce, Recycle, Reuse and Refuse are popularly known as, **(i) 4 R for sustainable development (ii) R's to be followed (ii) Essential R's for better life. (iv) None of the above** **Ans:** (i) **Q. 10** Number of live Births per 1000 people population in an year. **(i) Crude Birth rate (ii) Total Birth chart (iii) Additional births (iv) None of the above** **Ans:** (i) **Q. 11** Requirement of O₂ for microbial degradation of organic matter in water is **(i) BOD (ii) COD (iii) PPT (iv) PPM** **Ans:** (i) **Q. 12** Remains of organisms converted into fuels **(i) Fossil fuels (ii) Carbon credits (iii) Carbon ppt. (iv) None of the above** **Ans:** (i) **Q.-13** The shaking and trembling of earth is **(i) Earth Vibrations (ii) Tremors (iii) Earthquake (iv) None of the above** **Ans:** (ii) **Q. 14** Coal and Petroleum are **(i) Renewable resources (ii) Non-renewable resources (iii) Precious resources (iv) Degradable** **Ans:** (ii) **Q. 15** Planting a tree to give fruits is example of **(i) Sustainability (ii) Adding to pollution (ii) De-forestation (iv) Afforestation** **Ans:** (iv) **Q. 16** Amount of rain in an area over a period of time measured in cms or inches. **(i) Rainfall (ii) Flood (iii) Rain level (iv) None of the above** **Ans:** (i) **Q. 17** Green Revolution was mainly in ___ countries. **(i) Developing (ii) Developed (iii) Small (iv) Large** **Ans:** (i) **Q. 18** UV rays from sunlight are not allowed to reach earth due to ___ gas in atmosphere. **(i) CO2 (ii) 03 (iii) Cl₂ (iv) HC** **Ans:** (ii) **Q. 19** Antarctic Treaty is outcome of **(i) UNEP (ii) UNCED (iii) UN (iv) UNO** **Ans:** (i) **Q. 20** Electronic waste generated **(i) E-waste (ii) Solid waste (iii) Biomedical waste (iv) Electronic waste** **Ans:** (i) **Q. 21** Land degradation due to human activities **(i) Desertification (ii) Erosion (iii) Land slide (iv) Corrosion** **Ans:** (i) **Q. 22** Waste originating mainly from hospitals and clinics **(i) Biomedical waste (ii) Biological waste (iii) Biochemical waste (iv) None of the above** **Ans:** (i) **Q. 23** Chipko Andolan was done in **(i) Jharkhand (ii) Uttarakhand (iii) Kerala (iv) None of the above** **Ans:** (ii) **Q. 24** Bio reserves add to ____ value of natural environment. **(i) Protective (ii) Productive (iii) Preservative (iv) Preparative** **Ans:** (iii) **Q. 25** Sanitation facilities are constructed and made ____. **(i) Common to all (ii) Gender specific (iii) Only for women (iv) None of the above** **Ans:** (ii) **Q. 26** Rivers, wells and ponds get polluted with **(i) Heavy metals (ii) Aquatic animals (iii) Chemical compounds (iv) None of the above** **Ans:** (i) **Q. 27** Chain of food transfer from primary producer to various consumers **(i) Food chain (ii) Food web (iii) Food cycle (iv) None of the above** **Ans:** (i) **Q. 28** A tropical vegetation of shrubs and trees **(i) Mangroves (ii) Forest (iii) Marine vegetation (iv) None of the above** **Ans:** (i) **Q. 29** An organisation that works outside government **(i) NGO (ii) Nature lowers (iii) Activists (iv) Antisocial** **Ans:** (i) **Q. 30** A technique to distinguish between individuals of same species using DNA. **(i) DNA testing (ii) DNA finger printing (iii) DNA analysis (iv) DNA Tracing** **Ans:** (ii) **Q. 31** Asbestosis is disease of **(i) Heart (ii) Lungs (iii) Eyes (iv) Kidney** **Ans:** (ii) **Q. 32** ____ is a public movement **(i) Sardar sarovar (ii) Sagar dam (iii) 4R (iv) None of the above** **Ans:** (ii) **Q. 33** Wetland areas should not be ____ to protect environment. **(i) Destroyed (ii) Protected (iii) Preserved (iv) Produced** **Ans:** (i) **Q. 34** Along with government, ____ also put efforts to educate people. **(i) Companies (ii) Schools (iii) NGOs (iv) None of the above** **Ans:** (iii) **Q. 35** Tree hugging movement in Uttarakhand **(i) Chipko Andolan (ii) Asbestosis (iii) Agenda 21 (iv) None of the above** **Ans:** (i) **Q. 36** Slow gradual rise in temperature of earth due to green house gases **(i) Global warming (ii) Thermal pollution (iii) Heat Transfer (iv) None of the above** **Ans:** (i) **Q. 37** Not decomposable by biological means **(i) Degradable (ii) Non-degradable (iii) Non-biodegradable (iv) None of the above** **Ans:** (iii) **Q. 38** Sewage treatment plant is example of ____ **(i) Plant source (ii) Point source (iii) Non-point source (iv) General source** **Ans:** (iii) **Q. 39** Smoke + Fog makes ____ **(i) Smoky fog (ii) Foggy smoke (iii) Smog (iv) Snow** **Ans:** (iii) **Q. 40** Fly Ash from thermal power stations causes **(i) Air pollution only (ii) Soil pollution only (iii) Air and soil pollution-both (iv) None of the above** **Ans:** (iii) **Q. 41** The resources which are inexhaustible or which last long **(i) Renewable resources (ii) Recyclable resources (iii) Reusable resources (iv) Evergreen resources ** **Ans:** (i) **Q. 42** Photochemical smog is an **(i) Indoor air pollution (ii) Outdoor air pollution (iii) Example of air pollution (iv) None of the above** **Ans:** (i) **Q. 43** Green Revolution is ____ growth of world food production. **(i) Steady (ii) Rapid (iii) Slow (iv) None of the above** **Ans:** (ii) **Q. 44** Code of conduct based on moral values **(i) Attitude (ii) Asthetic (iii) Ethics (iv) Morals** **Ans:** (iii) **Q. 45** Physical or biological complexity of a system is **(i) Biodiversity (ii) Diversity (iii) Ecosystem (iv) Culture** **Ans:** (i) **Q. 46** Wind circulates round an area of low pressure anticlockwise: **(i) Cyclone (ii) Storm (iii) Anticyclone (iv) Wind power** **Ans:** (i) **Q. 47** Leakage of MIC happened in **(i) Midnight (ii) Morning (iii) Noon (iv) Evening** **Ans:** (i) **Q. 48** For sustainable development ____ Rare are followed **(i) 5 (ii) 2 (iii) 4 (iv) 3** **Ans:** (iii) **Q. 49** We have to ____ extinction of rare plants. **(i) Encourage (ii) Help (iii) Protect (iv) None of the above** **Ans:** (ii) **Q. 50** Shortage in natural resources is due to **(i) High population (ii) Low fertility of soil (iii) Low water quality (iv) None of the above** **Ans:** (i) **Q. 51** Sanitation facilities should be hygienically ____ to use. **(i) Safe (ii) Unsafe (iii) Proper (iv) None of the above** **Ans:** (i) **Q. 52** Poor sanitation affects quality of **(i) Water sources (ii) Management of contaminants (iii) Air (iv) None of the above** **Ans:** (i) **Q. 53** Humans do not have capacity to ____ the lost species **(i) Destroy (ii) Reproduce (iii) Grow (iv) Generate** **Ans:** (ii) **Q. 54** Conservation of forest is ____ than regeneration of forest. **(i) Less costly (ii) More expensive (iii) More difficult (iv) Easier** **Ans:** (i) **Q. 55** Gas leaked in Bhopal in 1984 is **(i) MIC (ii) CO₂ (iii) NO₂ (iv) None of the above** **Ans:** (i) **Q. 56** To protect wild species, ____ parks help **(i) Regional (ii) National (iii) Water (iv) All of the above** **Ans:** (ii) **Q. 57** EVS is important in both ___ and ___ countries. **(i) USA and UK (ii) China and India (iii) Developing and Developed (iv) None of the above** **Ans:** (iii) **Q. 58** "It is human right to water and sanitation" explicitly recognized by **(i) Human Rights commission (ii) UN General Assembly (iii) Both of above (iv) None of the above** **Ans:** (i) **Q. 59** ____ is a green house gas. **(i) CO₂ (ii) H₂S (iii) N₂ (iv) None of the above** **Ans:** (i) **Q. 60** The price of water and sanitation should be **(i) High (ii) Low (iii) Different (iv) None of the above** **Ans:** (ii) **Q. 61**Wide range of flora and fauna is **(i) Nature (ii) Biodiversity (iii) Environment (iv) Ecosystem** **Ans:** (ii) **Q. 62** Some plants are useful as they produce **(i) Medicines (ii) Fruits (iii) Flowers (iv) None of the above** **Ans:** (i) **Q. 63** High population gives rise to ____ management of resources. **(i) Poor (ii) Natural (iii) Proper (iv) None of the above** **Ans:** (i) **Q. 64** Natural environment serves as basis of our life. **(i) Politics (ii) Philosophy (iii) Culture (iv) Cycle** **Ans:** (ii) **Q. 65** Plants are valuable resources for many **(i) Vegetables and fruits (ii) Life saving medicines (iii) Both of above (iv) None of the above** **Ans:** (iii) **Q. 66** Crisis related to land is due to Rise in **(i) Prices (ii) Population (iii) Reforestation (iv) None of the above** **Ans:** (ii) **Q. 67** A very thin area in stratosphere is due to **(i) Ozone depletion (ii) Ozone molecules (iii) Ozonisation (iv) Ozone deterioration** **Ans:** (i) **Q. 68** Percentage of salt in water is expressed as **(i) Salt (ii) Salinity (iii) Saltiness (iv) None of the above** **Ans:** (ii) **Q. 69** Any exhaustible natural resource which cannot be replaced **(i) Non-renewable resource (ii) Non-replaceable resource (iii) Exhausting resource (iv) Degradable** **Ans:** (ii) **Q. 70** Reaction between Hydro carbon, ozone in sunlight leads to **(i) Photochemical smog (ii) Photochemical ozonisation of Hydrocarbon (iii) Hydrocarbon degradation (iv) Chemical smog** **Ans:** (i) **Q. 71** Procedures taken up in collection, treatment and disposal of waste is **(i) Waste management (ii) Waste dispersion (iii) Waste disposal (iv) None of the above** **Ans:** (i) **Q. 72** Public awareness aims at **(i) Protecting natural resources (ii) Utilizing natural resources (iii) Exploiting natural resources (iv) None of the above** **Ans:** (i) **Q. 73** Any exhaustible natural resource which cannot be replaced **(i) Non-renewable (ii) Non-replaceable (iii) Non-destructive (iv) None of the above** **Ans:** (i) **Q. 74** Deforestation destroys natural **(i) Environment (ii) Life (iii) Cycle (iv) Balance** **Ans:** (i) **Q. 75** A system without life **(i) Abiotic (ii) Biotic (iii) Sustainable (iv) Organic** **Ans:** (i) **Q. 76** Lack of safe sanitation leads to **(i) Diseases (ii) Water crisis (iii) Healthy environment (iv) None of the above** **Ans:** (ii) **Q. 77** Metals, glass, plastics can be ___ **(i) Recycled (ii) Refused (iii) Reduced (iv) Reformed** **Ans:** (i) **Q. 78** Resources in earth's crust **(i) Natural (ii) Renewable (iii) Ancient (iv) Plency** **Ans:** (i) **Q. 79** Process of synthesis of food by plants in sunlight **(i) Photosynthesis (ii) Photogenesis (iii) Photokinetics (iv) Photolysis** **Ans:** (i) **Q. 80** Waste matter which is hard and needs dilution **(i) Solid waste (ii) Industrial waste (iii) E-waste (iv) None of the above** **Ans:** (i) **Q. 81** High level of unpleasant sound causes **(i) Noise pollution (ii) Disturbance (iii) Irritation (iv) Music** **Ans:** (i) **Q. 82** Release of pollutants from identifiable source **(i) Point source (ii) Sourcing point (iii) Release point (iv) Fixed point** **Ans:** (i) **Q. 83** Developmental requirements ____ action-meeting present requirements — not affecting future needs is **(i) Appropriate action (ii) Proper development (iii) Sustainable Development (iv) Redevelopment** **Ans:** (iii) **Q. 84** Safe method of disposing waste is ____ **(i) Waste disposal (ii) Waste dispersion (iii) Waste treatment (iv) 4R** **Ans:** (i) **Q. 85** The species in world have numerous number of ____ **(i) Complex chemicals (ii) Toxic elements (iii) Useless substances (iv) None of the above** **Ans:** (i) **Q. 86** The ____ value of environment gives us peace. **(i) Aesthetic (ii) 4R (iii) Futuristic (iv) Spiritual** **Ans:** (i) **Q. 87** Population rise affects status of ____ **(i) Women and children (ii) Poor people (iii) Education and shelter (iv) None of the above** **Ans:** (i) **Q. 88** CFC is used widely as ____ **(i) Coolant (ii) Refrigerant (iii) Air coolers (iv) None of the above** **Ans:** (ii) **Q. 89** The points of agreement of "Earth summit" circulated as ____ **(i) Rio Declaration (ii) UNCED minutes (iii) Rio-de-Janero Declaration (iv) None of the above** **Ans:** (i) **Q. 90** ____ is important to save environment. **(i) Environmental protection (ii) EVS (iii) Environmental pollution (iv) None of the above** **Ans:** (i) **Q. 91** Cyclic movement of carbon, to and fro, between environment and organism, **(i) Carbon cycle (ii) Carbonization (iii) Coalition (iv) Carboxylation** **Ans:** (i) **Q. 92** A group of co-existing organisms which interact with the environment. **(i) Diversity (ii) Ecosystem (iii) Biodiversity (iv) Will** **Ans:** (ii) **Q. 93** A layer of gas 10 to 50 kms above the earth capable of absorbing UV rays from sunlight. **(i) Stratosphere (ii) Ozone layer (iii) Gas layer (iv) Lithosphere** **Ans:** (ii) **Q. 94** A species existing but in declining no. is ____ species. **(i) Threatened (ii) Endangered (iii) Normal (iv) Extinguishing** **Ans:** (i) **Q. 95** By law, no person is allowed to ____ or ____ the wild species. **(i) Care, protect (ii) Kill, sell (iii) Purchase, protect (iv) Care, kill** **Ans:** (ii) **Q. 96** ____ gas causes acid rain **(i) SO2 (ii) O₂ (iii) N₂ (iv) None of the above** **Ans:** (i) **Q. 97** United nations conference on environment and development (UNCED) is popularly known as **(i) Earth summit (ii) Save environment movement (iii) Save earth movement (iv) None of the above** **Ans:** (i) **Q. 98** Soil pollution is due to excessive use of **(i) Fertilisers (ii) Water (iii) Seeds (iv) Soil** **Ans:** (i) **Q. 99** A plant that can produce food is called **(i) Provider (ii) Producer (iii) Consumer (iv) Developer** **Ans:** (ii) **Q. 100** Preventing overexploitation of non-renewable natural resources **(i) Nature conservation (ii) Environmental degradation (iii) Exploiting biodiversity (iv) None of the above** **Ans:** (i) **Q. 101** A tropical forest having high rainfall is called **(i) Plain forest (ii) Rainfall forest (iii) Rainy forest (iv) None of the above** **Ans:** (iii) **Q. 102** Power plant cooling tower causes ____ pollution in surrounding area. **(i) Thermal (ii) Water (iii) Atmospheric (iv) Air** **Ans:** (i) **Q. 103** Process of converting waste into useful material **(i) Recycling (ii) Refused (iii) Reduced (iv) Reforming** **Ans:** (i) **Q. 104** Contaminated agricultural run off pollutes **(i) Food chain and food wels (ii) Air (iii) Pesticides (iv) None of the above** **Ans:** (i) **Q. 105** Montreal protocol is on substances that, **(i) Deplete ozone (ii) Cause Acid Rain (iii) Cause Global warming (iv) None of the above** **Ans:** (i) **Q. 106** An area where biological population occurs. **(i) Ecosystem (ii) Habital (iii) Divinity (iv) Diversity** **Ans:** (i) **Q. 107** CO₂ is **(i) Green House Gas (ii) Red in colour (iii) Insoluble in water (iv) Heavier than air** **Ans:** (i) **Q. 108** Unit of sound intensity is ____ **(i) Decibel (ii) Bel (iii) Frequency unit (iv) None of the above** **Ans:** (i) **Q. 109** Regional animals and animal life **(i) Fauna (ii) Flora (iii) Ecosystem (iv) None of the above** **Ans:** (i) **Q. 110** Violent storm with very strong winds **(i) Cyclone (ii) Anti cyclone (iii) Hurricane (iv) Tsunami** **Ans:** (iii) **Q. 111** In ____ Hemisphere, cyclone circulates clockwise in Southern. **(i) Cyclone (ii) Anticyclone (iii) Tropical storm (iv) None of the above** **Ans:** (ii) **Q. 112** Excessive intake of fluoride causes **(i) Thyroid problem (ii) Fluorosis (iii) Fluorination (iv) Fluorolysis** **Ans:** (ii) **Q. 113** Cycle of evaporation of water to rain fall is ____ **(i) Hydrological (ii) Rain cycle (iii) Carbon cycle (iv) Nitrogen cycle** **Ans:** (i) **Q. 114** Rain fall is measured in ____ units. **(i) Centimeters or Inches (ii) Millimeters or kilometers (iii) Inches or kilometers (iv) PPM** **Ans:** (i) **Q. 115** Western Atlantic ocean experience **(i) Hurricane (ii) Volcano (iii) Storm (iv) Cyclone** **Ans:** (i) **Q. 116** Large no. of trees naturally grown in area. **(i) Forest (ii) Garden (iii) Mangrove (iv) None of the above** **Ans:** (i) **Q. 117** Oxygen required by non-biodegradable substances in water **(i) COD (ii) BOD (iii) Oxidation (iv) Oxygenation** **Ans:** (i) **Q. 118** Scale to measure intensity of earthquake is **(i) Richter scale (ii) Vector (iii) Scalar (iv) dB ** **Ans:** (i) **Q. 119** Green House gases are responsible for ____ **(i) Global warming (ii) Excess Heat (iii) Acid Rain (iv) None of the above** **Ans:** (i) **Q. 120** Fly Ash is ____ portion of solid fuel. **(i) Combustible (ii) Non-combustible (iii) Partially burnt (iv) Harmful** **Ans:** (ii) **Q. 121** Hurricane means **(i) Voilent storm (ii) Water pollution (iii) Hydrological cycle (iv) None of the above ** **Ans:** (i) **Q. 122** Stratosphere means **(i) gases surrounding a star (ii) upper atmosphere above the troposphere and below the mesosphere (iii) Solid part of the earth's surface (iv) None of the above** **Ans:** (ii) **Q. 123** WWF-India was established as: **(i) Charitable trust (ii) NGO (iii) Public sector organization (iv) None of the above** **Ans:** (ii) **Q. 124** Photo synthesis is a characteristic feature of **(i) Grasses (ii) Green plants (iii) Soil (iv) Non of the above** **Ans:** (i) **Q. 125** Safe water is essential for **(i) Hygiene (ii) Washing (iii) Pumping (iv) None of the above** **Ans:** (i) **Q. 126** The term ____ is used to describe all efforts of government and NGOs to make the people environment aware. **(i) EVS (ii) EC (iii) Environmental education (iv) None of the above** **Ans:** (i) **Q. 127** Movement by women in Tehri-Garhwal in Uttarakhand **(i) Chipko Andolan (ii) Women liberalization (iii) Agenda 21 (iv) Women Development** **Ans:** (i) **Q. 128** Outside city where municipal waste is dumbed **(i) Land fill (ii) Wet land (iii) Garbage (iv) Grass land** **Ans:** (i) **Q. 129** A protocol put forth by UNEP on ozone depleting substances **(i) UNCED (ii) Montreal (iii) Biodiversity (iv) UNEP** **Ans:** (ii) **Q. 130** The ____ refers to the kingdom of living organisms and their interactions with the environment **(i) Atmosphere (ii) Lithosphere (iii) Hydrosphere (iv) Biosphere** **Ans:** (iv) **Q. 131** The biosphere is very large and complex and is divided into smaller units called ____ **(i) Organisms (ii) Ecosystems (iii) Module (iv) None of these** **Ans:** (ii) **Q. 132** ____ is a natural process that warms the Earth's surface. **(i) Greenhouse effect (ii) Global warming (iii) Deforestation (iv) None of these** **Ans:** (i) **Q. 133** How is the greenhouse effect experienced on earth? **(i) Global worming. (ii) Pollution (iii) Both a. and b (iv) None of the above** **Ans:** (iii) **Q. 134** Which of the following gases is/are responsible for global warming? **(i) Carbon dioxide (CO₂) (ii) Water vapour (H₂O) (iii) Both a. and b. (iv) None of the above** **Ans:** (iii) **Q. 135** In desert areas, there is large difference between day and night temperatures mainly because of **(i) Presence of carbon dioxide in air as it acts as barrier for emanating infrared radiation from the earth surface (ii) Presence of water vapour in air as it acts as barrier for emanating infrared radiation from the earth surface (iii) Absence of carbon dioxide in air as it acts as barrier for emanating infrared radiation from the earth surface (iv) Absence of water vapour in air as it acts as barrier for emanating infrared radiation from the earth surface** **Ans:** (ii) **Q. 136** The radiation energy from the sun is produced by **(i) Fission reaction (ii) Fusion reaction (iii) Both a. and b. (iv) None of the above** **Ans:** (ii) **Q. 137** Which of the following mentioned GHGs has the highest atmospheric lifetime ? **(i) Carbon tetrafluoride (ii) Nitrous oxide (iii) Methane (iv) CFC** **Ans:** (i) **Q. 138** Which of the following greenhouse gas is contributed by cattle farming? **(i) Nitrous oxide (ii) Methane (iii) Carbon monoxide (iv) All of the mentioned** **Ans:** (ii) **Q. 139** Volcanic eruptions contribute to the global greenhouse phenomenon. **(i) True (ii) False** **Ans:** (i) **Q. 140** Gas molecules that absorb thermal infrared radiation and are present in large quantity to change climate system are known as **(i) alpha radiations (ii) beta radiations (iii) ozone gases (iv) greenhouse gases** **Ans:** (iv) **Q. 141** Greenhouse gases which is present in very high quantity is **(i) Propane (ii) Ethane (iii) Carbon dioxide (iv) Methane** **Ans:** (iv) **Q. 142** Exchange of outgoing and incoming radiations that keeps Earth warm is known as **(i) Greenhouse effect (ii) Radiation effect (iii) Infrared effect (iv) Ozone layer depletion** **Ans:** (i) **Q. 143** Wavelength of infrared radiations is **(i) Greenhouse effect (ii) Radiation effect (iii) Infrared effect (iv) Ozone layer depletion** **Ans:** (ii) **Q. 144** Greenhouse gases effect on earth's atmosphere is increased by **(i) CFCs (chlorofluorocarbons) (ii) air conditioners (iii) perfumes (iv) burning fossil fuels** **Ans:** (i) **Q. 145** If atmosphere doesn't act like greenhouse, temperature of earth would become **(i) too pleasant to enjoy (ii) too cold to survive (iii) too hot to survive (iv) too terrible to survive** **Ans:** (ii) **Q. 146** Waves that pass through glass walls of greenhouse are in form of **(i) gamma rays (ii) x-rays (iii) infrared waves (iv) radio waves** **Ans:** (iv) **Q. 147** Global warming effects **(i) forests around the globe (ii) temperature of the globe (iii) wind and moisture of the globe (iv) water around the globe** **Ans:** (ii) **Q. 148** The gases that contribute to the greenhouse effect on Earth are, in order of greatest to smallest in importance, **(i) CO₂, H₂O, CH, (ii) CH, CO₂, H₂O (iii) H₂O, CO₂, CH, (iv) H₂O, CH, CO₂** **Ans:** (iii) **Q. 149** The order of the atmospheric layers, starting from closest to the surface to the top of the atmosphere, is **(i) Mesosphere, Troposphere, Thermosphere, Stratosphere (ii) Troposphere, Stratosphere, Mesosphere, Thermosphere (iii) Thermosphere, Mesophere, Troposphere, Stratosphere (iv) Troposphere, Mesosphere, Stratosphere, Thermosphere** **Ans:** (ii) **Q. 150** By how much has atmospheric carbon dioxide concentration increased ever since the Industrial Revolution? **(i) 20% (ii) 10% (iii) 40% (iv) 60%** **Ans:** (i) **Q. 151** Which is the most abundant greenhouse gas in the atmosphere? **(i) Carbon dioxide (ii) Water vapour (iii) Methane (iv) Nitrogen** **Ans:** (ii) **Q. 152** Which of the following is the largest sink for carbon dioxide gas? **(i) Forests (ii) Oceans (iii) Ice sheets (iv) Grasslands** **Ans:** (ii) **Q. 153** Apart from Earth, which other celestial body(s) exhibits greenhouse gas effect? **(i) Venus (ii) Mars (iii) Titan (iv) All of the mentioned** **Ans:** (iv) **Q. 154** Which of the following radiations of the sun do greenhouse gases trap? **(i) Visible radiations (ii) Infrared radiations (iii) UV radiations (iv) All the radiations** **Ans:** (ii) **Q. 155** Clouds help in cooling down the planet and do not contribute to greenhouse effect. True or False? **(i) True (ii) False** **Ans:** (i) **Q. 156** What does GWP in the context of greenhouse gases indicate? **(i) Global Warming Parameters (ii) Gradual Warming Pattern (iii) Global Warming Patterns (iv) Global Warming Potential** **Ans:** (iv) **Q. 157** At what concentration (in ppm), is nitrogen present in the atmosphere? **(i) 780,840 (ii) 390,420 (iii) 78,084 (iv) 900,000** **Ans:** (i) **Q. 158** The planetary boundary layer belongs to which of the following atmospheric layers? **(i) Exosphere (ii) Ionosphere (iii) Stratosphere (iv) None of the mentioned** **Ans:** (i) **Q. 159** What would have been the average temperature of Earth without greenhouse gases? **(i) 0°C (ii) -7°C (iii) -9°C (iv) -19 °C** **Ans:** (iii) **Q. 160** Ever since the industrial revolution, by how much has the average temperature of the Earth increased? **(i) 0.24 °C (ii) 0.6 °C (iii) 1.2°5C (iv) 1.8 °C** **Ans:** (iii) **Q. 161** How much of the sun's radiation energy is absorbed by the greenhouse gases to warm the planet? **(i) 75 PW (ii) 1750 GW (iii) 1500 MW (iv) 150 TW** **Ans:** (ii) **Q. 162** What is the emissivity of the Earth's surface? **(i) 0.457 (ii) 0.578 (iii) 0.135 (iv) 1.42** **Ans:** (i) **Q. 163** The Earth is still said to be in the "ice age" period. **(i) True (ii) False** **Ans:** (ii) **Q. 164** Below which of the following pH is rain regarded as 'acid rain'? **(i) 7 (ii) 7.3 (iii) 5.6 (iv) 6** **Ans:** (iii) **Q. 165** Glass containers are generally not preferred for sampling rain water. Why? **(i) Glass containers are expensive (ii) Glass containers are not easy to maintain (iii) Glass containers affect the pH of the rain water (iv) All of the mentioned** **Ans:** (iv) **Q.