[{"id":173906,"question":"Atmospheric region found between 50-58 km from the earthis.","choices":[{"text":"Thermosphere","value":"A"},{"text":"Stratosphere","value":"B"},{"text":"Mesophere","value":"C"},{"text":"Thermosphere","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":173905,"question":"The percentage of sun light absorbed by atmospheric gases is.","choices":[{"text":"2%","value":"A"},{"text":"10%","value":"B"},{"text":"18%","value":"C"},{"text":"25%","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":173904,"question":"The percentage by volume of nitrogen in dry gas is.","choices":[{"text":"78.09%","value":"A"},{"text":"20.94%","value":"B"},{"text":"0.93%","value":"C"},{"text":"0.03%","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":173903,"question":"The envelope of different gases around the earth is called.","choices":[{"text":"Atmosphere","value":"A"},{"text":"Brosphere","value":"B"},{"text":"Lithosphere","value":"C"},{"text":"Hydrosphere","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":173902,"question":"Atmosphere has regions.","choices":[{"text":"One","value":"A"},{"text":"Two","value":"B"},{"text":"Three","value":"C"},{"text":"Four","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":173901,"question":"Earth has natural systems.","choices":[{"text":"One","value":"A"},{"text":"Two","value":"B"},{"text":"Three","value":"C"},{"text":"Four","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":173900,"question":"Carbon monoxide is harmful to us because.","choices":[{"text":"It paralyses the lungs.","value":"A"},{"text":"It damages lungs tissues.","value":"B"},{"text":"It reduces oxygen carrying ability of haemoglobin","value":"C"},{"text":"It makes the blood coagulate.","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":173899,"question":"Global warming is because of.","choices":[{"text":"Absorption of infrared radiation emitted by earth surface.","value":"A"},{"text":"Absorption of infrared radiation coming from sun.","value":"B"},{"text":"Absorption of infrared Ultraviolet coming from the sun.","value":"C"},{"text":"Emission of ultraviolet radiation from the earth's surface.","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":173898,"question":"The process by which atmospheric nitrogen is turned into nitrates in the soil is called.","choices":[{"text":"Nitration","value":"A"},{"text":"Fixing","value":"B"},{"text":"Oxidation","value":"C"},{"text":"Reduction","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":173897,"question":"Which one of these pollutants are not found in car exhaust fumes?","choices":[{"text":"CO<sub>2</sub>","value":"A"},{"text":"O<sub>3</sub>","value":"B"},{"text":"NO<sub>2</sub>","value":"C"},{"text":"SO<sub>2</sub>","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":173896,"question":"Effects of ozone depletion are following except the one.","choices":[{"text":"Increases infectious diseases","value":"A"},{"text":"Increases crops production","value":"B"},{"text":"Can cause skin cancer","value":"C"},{"text":"Can cause climatic changes.","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":173895,"question":"Which gas protects the Earth's surface from ultraviolet radiations?","choices":[{"text":"CO<sub>2</sub>","value":"A"},{"text":"CO","value":"B"},{"text":"N<sub>2</sub>","value":"C"},{"text":"O<sub>3</sub>","value":"D"},{"value":"E"}],"correctAnswer":4}]