[{"id":1072299,"question":"Oxides formed when oxygen reacts with metals.","choices":[{"text":"Acidic","value":"A"},{"text":"Basic","value":"B"},{"text":"Both basic and amphoteric","value":"C"},{"text":"Neutral","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":1072298,"question":"Secondary pollutants present in the atmosphere are.","choices":[{"text":"Oxides of nitrogen","value":"A"},{"text":"Oxides of sulphur","value":"B"},{"text":"Ozone and PAN","value":"C"},{"text":"Oxides of Carbon","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":1072297,"question":"Sodium is considered more reactie than magnesium because.","choices":[{"text":"It is more electropositive than magneium","value":"A"},{"text":"It reacts with water slowly","value":"B"},{"text":"It is present in second group","value":"C"},{"text":"It is the lss metallic","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":1072296,"question":"The contact process used for the industrial production of H2SO4 is sensitive to the impurities present in SO2 and O2 becasue the impurities.","choices":[{"text":"Affect the capability of the catalyst","value":"A"},{"text":"Affect the purity of H2SO4","value":"B"},{"text":"Do not let SO2 to reafct with oxygen","value":"C"},{"text":"Decrease the rate of reaction appreciably.","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":1072295,"question":"The reason for maintaining higher temperature for the production of ammonia is.","choices":[{"text":"Activation energy of teh reaction is very high","value":"A"},{"text":"Activation energy of the reactio is very low","value":"B"},{"text":"Nitrogen and hydrogen are both gases.","value":"C"},{"text":"At low temperature nitrogen and hydrogen change into liquids","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":1072294,"question":"Which metal cannot displace hydrogen from dilute acids.","choices":[{"text":"Iron","value":"A"},{"text":"Zinc","value":"B"},{"text":"Lead","value":"C"},{"text":"Gold","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":1072293,"question":"Peroxyaccetyl nitrate is formed by teh reaction of sunlight with NOx and.","choices":[{"text":"carbon dioxide","value":"A"},{"text":"Volatile organic compounds","value":"B"},{"text":"Water vapour","value":"C"},{"text":"Oxygen","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":1072292,"question":"Which gas is rapidly converted into nitrogen dioxide by oxygen in the air.","choices":[{"text":"Nitric oxide","value":"A"},{"text":"Nitrous oxide","value":"B"},{"text":"Ammonia","value":"C"},{"text":"Nitrogen","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":1072291,"question":"It is an amphoteric substances.","choices":[{"text":"Water","value":"A"},{"text":"Carbon dioxide","value":"B"},{"text":"Sodium hydroxide","value":"C"},{"text":"Hydrochloric acid","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":1072290,"question":"Which of the following metal reacts most violently with dilute acids.","choices":[{"text":"Sodium","value":"A"},{"text":"Zinc","value":"B"},{"text":"Iron","value":"C"},{"text":"Magnessium","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":1072289,"question":"Which metal produces a crimson flame when burned.","choices":[{"text":"Calcium","value":"A"},{"text":"Strontium","value":"B"},{"text":"Magnesium","value":"C"},{"text":"Potassium","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":1072288,"question":"It is an example of a neutral oxide.","choices":[{"text":"ZnO","value":"A"},{"text":"Na2O","value":"B"},{"text":"CO","value":"C"},{"text":"Al2O3","value":"D"},{"value":"E"}],"correctAnswer":3}]