Environmental Science Past Paper PDF - SRM Institute of Science & Technology

SRM INSTITUTE OF SCIENCE & TECHNOLOGY FACULTY OF ENGINEERING & TECHNOLOGY Bharathi Salai, Ramapuram, Chennai – 600 089 Department of Chemistry SUBJECT: ENVIRONMENTAL SCIENCE SUBJECT...

SRM INSTITUTE OF SCIENCE & TECHNOLOGY FACULTY OF ENGINEERING & TECHNOLOGY Bharathi Salai, Ramapuram, Chennai – 600 089 Department of Chemistry SUBJECT: ENVIRONMENTAL SCIENCE SUBJECT CODE : 21CYM101T UNIT I - MCQ  Which of the following conceptual components of the environment are effective transporters of matter? (a) Atmosphere and hydrosphere (b) Atmosphere and lithosphere (c) Hydrosphere and lithosphere (d) Lithosphere and biosphere  A relatively dense layer of band which is found in the thermosphere is known as? (a) Troposphere (b) Mesosphere (c) Stratosphere (d) Ionosphere  Which of the following conceptual spheres of the environment has the least storage capacity for matter? (a) Atmosphere (b) Lithosphere (c) Hydrosphere (d) Biosphere  Which of the following is an example of impact of development activities on the Hydrosphere? (a) Air pollution (b) Soil pollution (c) Soil erosion (d) Water pollution  Which of the following statements is true? (a) Troposphere is equally thick across different parts of the world (b) Troposphere contains the ozone layer (c) Troposphere is thinner at the equator than at the poles (d) Troposphere is thicker at the equator than at the poles  The temperature decreases with altitude in the stratosphere layer. (a) True (b) False  Which of the following indicates the correct order of the principal layers of the earth’s atmosphere from top to bottom? (a) Troposphere – Stratosphere – Mesosphere – Thermosphere – Exosphere (b) Thermosphere – Stratosphere – Troposphere – Mesosphere – Exosphere (c) Exosphere – Thermosphere – Mesosphere – Stratosphere – Troposphere (d) Exosphere – Mesosphere – Thermosphere – Stratosphere – Troposphere  The study of living organisms with the environment is known as ____________ (a) Ecosystem (b) Environment (c) Community (d) Ecology  A relatively dense layer of band which is found in the thermosphere is known as? (a) Troposphere (b) Mesosphere (c) Stratosphere (d) Ionosphere  Highest percentage of air consists of (a) Oxygen (b) Carbon dioxide (c) Nitrogen (d) Argon  All are particulate pollutants except (a) Dust (b) Ozone (c) Soot (d) Smoke  Which of the following is a secondary pollutant? (a) CO2 (b) CO (c) O3 (d) SO2  The term “Environment” means (a) Sum total of all conditions that the life and development of all organisms on earth (b) A beautiful earth (c) Earth and water (d) A combination of plants and animals  The layer which provides an ideal site for flying of jet planes is (a) Thermosphere (b) Stratosphere (c) Mesosphere (d) Troposphere  71% of the earth's surface is covered with: (a) Land (b) Air (c) Water (d) Coal  Major source of pollutant sulphur dioxide is: (a) Burning of fossil fuels (b) Human activities (c) Pesticides and Insecticides (d) All the above  The Taj Mahal is being affected by (a) Noise pollution (b) Air pollution (c) Water pollution (d) None of these  Most polluted river in the world is (a) Yamuna (b) Cavery (c) Chenab (d) Ganga  Air pollution causes (a) Global warming (b) Respiratory problems (c) Soil erosion (d) None of these  Greenhouse gas is (a) Nitrogen (b) Oxygen (c) Methane (d) Carbon dioxide  The percentage of nitrogen is (a) 21% (b) 78% (c) 12% (d) 87%  Carbon monoxide is a pollutant because (a) It reacts with O2 (b) It inhibits glycolysis (c) Makes the nervous system inactive (d) Reacts with haemoglobin  The one which is not considered as a naturally occurring greenhouse gas is… (a) Ethane (b) Methane (c) Carbon dioxide (d) Nitrous oxide  Gas leaked in Bhopal tragedy: (a) Methyl isocyanate (b) Potassium isothiocyanate (c) Ethyl isocyanate (d) Sodium isothiocyanate  Which layer of the atmosphere contains the ozone layer? (a) Exosphere (b) Troposphere (c) Mesosphere (d) Stratosphere  There is a threat to the beauty of the Taj Mahal from: (a) CO2 (b) CFC's (c) Temperature (d) Acid rain  Which of the following is not an air pollutant? (a) Oxygen (b) Sulphur dioxide (c) Nitrogen dioxide (d) Carbon dioxide  Aerosols consisting of solid particles produced by combustion? (a) Fog (b) Smog (c) Smoke (d) None of these  Which gas is mainly produced due to incomplete burning of wood? (a) CO (b) SO2 (c) NO2 (d) NO3  What causes pollution? (a) Human activities (b) Trees (c) Both of these (d) None of these  CNG is a (a) Polluted fuel (b) Clean fuel (c) Harmful fuel (d) None  Pollution of water is responsible for (a) Oil refineries (b) Paper factories (c) Sugar mills (d) All  Chlorofluorocarbon is used in (a) Refrigerators (b) Air conditioners (c) Perfumes (d) All  The ____________ is an important requirement of aquatic life. (a) Dissolved nitrogen (b) Dissolved chlorine (c) Dissolved oxygen (d) Dissolved methane  Wastewater released from _________ are not the sources of bacteria. (a) Sanitaria (b) Municipalities (c) Tanning (d) Industries  Bacteria and microorganisms present in water will cause _________ in humans and animals. (a) Indigestion (b) Intestinal tract issues (c) Brain tumor (d) Cancer  Soil component of the earth is called __________. (a) Hydrosphere (b) Atmosphere (c) Lithosphere (d) Biosphere  Water component of the earth is called __________. (a) Hydrosphere (b) Atmosphere (c) Lithosphere (d) Biosphere  Percentage of Nitrogen in the atmosphere (a) 78% (b) 68% (c) 56% (d) 84%  Necrosis disease of plants is due to __________ pollutant. (a) NO2 (b) CO (c) SO2 (d) O3  Blue Baby syndrome is due to the excess of __________ concentration in water. (a) Phosphate (b) Chloride (c) Nitrate (d) Chromate  Ozone layer filters __________ radiation from the sun. (a) Alpha (b) UV (c) Beta (d) IR  Discoloration of limestone is caused by __________ air pollutant. (a) NO2 (b) CO (c) SO2 (d) All of the above  Which of the following leads to a disease called bronchitis? (a) SO2 (b) SO3 (c) SO4 (d) CO2  An organism which can monitor air pollution (a) Fungi (b) Algae (c) Bacteria (d) Lichen  Hydrosphere includes (a) Animals (b) Soil (c) Plants (d) Water bodies  Area of land, water, and air where life exists is called (a) Biosphere (b) Lithosphere (c) Atmosphere (d) Hydrosphere  Which of the following makes up about 21 percent of our atmosphere? (a) Carbon dioxide (b) Oxygen (c) Nitrogen (d) Water vapor  When was the greenhouse effect discovered? (a) 1814 (b) 1824 (c) 1854 (d) 1884  Which part of the atmosphere is actually made up of two layers? (a) Troposphere (b) Mesosphere (c) Stratosphere (d) Thermosphere  Secondary pollutants are formed from the reaction of (a) Primary pollutants (b) Smoke (c) Carbon monoxide (d) Smog  Proportion of CO consumption consists of basic components: (a) The leaf boundary layer (b) The stomata (c) Radiation exchange (d) All the above  Which is the largest source for the production of nitrous oxide? (a) Chemical industry (b) Fertilizer industry (c) Fossil fuel combustion (d) Bacterial action  Gas molecules absorbing thermal infrared radiation and present in large quantities to change the climate system are known as ______. (a) Ozone gases (b) Beta radiations (c) Alpha radiations (d) Greenhouse gases  The burning of fossil fuels releases large amounts of ______. (a) Nitrogen (b) Sulfur (c) Carbon (d) Hydrogen  Ozone is formed in the upper atmosphere by a photochemical reaction with: (a) Ultraviolet solar radiation (b) Infrared radiation (c) Visible light (d) All the above  The biggest producer of carbon monoxide is (a) Factories (b) Transportation (c) Chemical waste (d) Fires  Important abiotic factors in ecosystems include which of the following? (a) Temperature (b) Water (c) Wind (d) Both (a) and (b)  Air pollution is caused by (a) Insecticides (b) Sewage (c) Smoke (d) Loudspeakers  The lowest layer of the atmosphere is called __________. (a) Mesosphere (b) Stratosphere (c) Troposphere (d) Thermosphere  Which pollutant affects oxygen transport in blood? (a) CO2 (b) CO (c) PAN (d) O3  One chlorine atom can destroy over __________ ozone molecules. (a) 1,00,000 (b) 10,000 (c) 1,000 (d) 100  CFC and other widely used chemicals produce roughly __________ of chlorine in the stratosphere. (a) 74% (b) 84% (c) 92% (d) 65%  Chlorosis disease of plants is due to __________ pollutant. (a) NO2 (b) CO (c) SO2 (d) O3  Ozone gas is found in __________. (a) Mesosphere (b) Stratosphere (c) Troposphere (d) Thermosphere  Ozone concentration in the stratosphere is __________ ppm. (a) 10 (b) 15 (c) 25 (d) 5  Greenhouse gases trap __________ rays from the earth. (a) UV (b) IR (c) Alpha (d) Beta