[{"id":250732,"question":"The speed of sound through Iron.","choices":[{"text":"340 meter per second","value":"A"},{"text":"1500 meter per second","value":"B"},{"text":"5000 meter per second","value":"C"},{"text":"500 meter per second","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":250731,"question":"The speed of sound through water.","choices":[{"text":"340 meter per second","value":"A"},{"text":"1500 meter per second","value":"B"},{"text":"5000 meter per second","value":"C"},{"text":"500 meter per second","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":250730,"question":"The speed of sound through air.","choices":[{"text":"340 meter per secod","value":"A"},{"text":"1500 meter per second","value":"B"},{"text":"5000 meter per second","value":"C"},{"text":"500 meter per second","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":250729,"question":"Sound is produced by","choices":[{"text":"Vibrating object","value":"A"},{"text":"Transparent object","value":"B"},{"text":"Opaque object","value":"C"},{"text":"Translucent object","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":250728,"question":"Sound is a type of energy.","choices":[{"text":"Electrical","value":"A"},{"text":"Mechanical","value":"B"},{"text":"Thermal","value":"C"},{"text":"Chemical","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":250727,"question":"____________ light is the reiurs of light when it hits as opaque surface.","choices":[{"text":"Refraction","value":"A"},{"text":"Reflection","value":"B"},{"text":"Dis persion","value":"C"},{"text":"Echo","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":250726,"question":"Light travels.","choices":[{"text":"In straight line","value":"A"},{"text":"In the form of wave","value":"B"},{"text":"From time to time","value":"C"},{"text":"In the form of zig zag","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":250725,"question":"Tissue paper allows it to pass through","choices":[{"text":"Complete light","value":"A"},{"text":"Some part of light","value":"B"},{"text":"Special light","value":"C"},{"text":"Inadequste light","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":250724,"question":"Which things are not transparent objects.","choices":[{"text":"wood","value":"A"},{"text":"Metal","value":"B"},{"text":"Stone","value":"C"},{"text":"All of these","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":250723,"question":"Which things are transparent object.","choices":[{"text":"Water","value":"A"},{"text":"Glass","value":"B"},{"text":"Air","value":"C"},{"text":"All of these","value":"D"},{"value":"E"}],"correctAnswer":4}]