[{"id":175176,"question":"Which gas saves the surface of earth from ultra violet radiation?","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},{"id":175175,"question":"The formula of ozone is.","choices":[{"text":"O<sub>2</sub>","value":"A"},{"text":"O<sub>3</sub>","value":"B"},{"text":"O","value":"C"},{"text":"CO","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":175174,"question":"Which one of the following is not air pollutant.","choices":[{"text":"CO<sub>2</sub>","value":"A"},{"text":"CO","value":"B"},{"text":"NO<sub>2</sub>","value":"C"},{"text":"O<sub>2</sub>","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":175173,"question":"Acid rain damages the building it is due to reaction on.","choices":[{"text":"Calcium sulphate","value":"A"},{"text":"Calcium nitrate","value":"B"},{"text":"Calcium carbonate","value":"C"},{"text":"Calcium oxilat","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":175172,"question":"Normaily rain water is weakly acidic because.","choices":[{"text":"SO<sub>3</sub>","value":"A"},{"text":"CO<sub>2</sub>","value":"B"},{"text":"CO<sub>3</sub>","value":"C"},{"text":"NO<sub>2</sub>","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":175171,"question":"pH of acid rain is:","choices":[{"text":"7-5","value":"A"},{"text":"6-7","value":"B"},{"text":"1-2","value":"C"},{"text":"4-5","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":175170,"question":"Which metal present in acid rain affect the aquatic life by clogging fish gills?","choices":[{"text":"Lead","value":"A"},{"text":"Chromium","value":"B"},{"text":"Aluminium","value":"C"},{"text":"Mercury","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":175169,"question":"Building and Monuments lose their beauty and shine due to","choices":[{"text":"U.V radiations","value":"A"},{"text":"Chlorofluoro carbons","value":"B"},{"text":"Acid rain","value":"C"},{"text":"IR radiations.","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":175168,"question":"Carbon monoxide is harmful to use because it:","choices":[{"text":"Paralyses lungs","value":"A"},{"text":"Damages lungs","value":"B"},{"text":"Reduce oxygen carrying ability of hemoglobin","value":"C"},{"text":"Make the blood coagulate","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":175167,"question":"Cause of global warming is:","choices":[{"text":"CO<sub>2 </sub>gas","value":"A"},{"text":"SO<sub>2</sub>gas","value":"B"},{"text":"NO<sub>2</sub>gas","value":"C"},{"text":"O<sub>2</sub>gas","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":175166,"question":"Cause of global warming is :","choices":[{"text":"CO<sub>2</sub> gas","value":"A"},{"text":"SO<sub>2</sub>gas","value":"B"},{"text":"NO<sub>2</sub>gas","value":"C"},{"text":"O<sub>2</sub>gas","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":175165,"question":"How many atmospheric temperature increase every year due to accumulation of CO<sub>2</sub> in air.","choices":[{"text":"0.03 <sup>o</sup>C","value":"A"},{"text":"0.05 <sup>o</sup>C","value":"B"},{"text":"1<sup>o</sup>C","value":"C"},{"text":"2<sup>o</sup>C","value":"D"},{"value":"E"}],"correctAnswer":2}]