[{"id":173653,"question":"The strone heating of coal in retorts in the absence of air is called.","choices":[{"text":"Fractional distillation","value":"A"},{"text":"sublimation","value":"B"},{"text":"Roasting","value":"C"},{"text":"Destructive distillation","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":173652,"question":"Main component of natural gas is","choices":[{"text":"Methane","value":"A"},{"text":"Propane","value":"B"},{"text":"Butane","value":"C"},{"text":"Propene","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":173650,"question":"Coal having 90% carbon contents is called.","choices":[{"text":"Peat","value":"A"},{"text":"Lignite","value":"B"},{"text":"anthracite","value":"C"},{"text":"bituminous","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":173649,"question":"The ability of carbon atoms to form chains is called.","choices":[{"text":"Isomerism","value":"A"},{"text":"Catenation","value":"B"},{"text":"Resonance","value":"C"},{"text":"Condensation","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":42165,"question":"Formula of acetaldehyde is:","choices":[{"text":"","img":"42165_12a.jpg","value":"A"},{"text":"","img":"42165_12b.jpg","value":"B"},{"text":"","img":"42165_12c.jpg","value":"C"},{"text":"","img":"42165_12d.jpg","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":42160,"question":"General formula of alcohols is:","choices":[{"text":"RCHO","value":"A"},{"text":"ROH","value":"B"},{"text":"O= R - C -OH","value":"C"},{"text":"O = R - C- R","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":38112,"question":"Which one of the following is a synthetic fiber:","choices":[{"text":"cotton","value":"A"},{"text":"wool","value":"B"},{"text":"nylon","value":"C"},{"text":"silk","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":38111,"question":"Petroleum is refined by:","choices":[{"text":"destructive distillation","value":"A"},{"text":"fractional distillation","value":"B"},{"text":"simple distillation","value":"C"},{"text":"dry distillation","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":38110,"question":"Alkanes are also called:","choices":[{"text":"olefins","value":"A"},{"text":"Paraffins","value":"B"},{"text":"aliphatic compound","value":"C"},{"text":"cyclic compounds","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":38109,"question":"The black residue of the coal tar is called:","choices":[{"text":"peat","value":"A"},{"text":"lignite","value":"B"},{"text":"pitch","value":"C"},{"text":"matte","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":38108,"question":"What is the percentage of carbon in anthracite?","choices":[{"text":"60%","value":"A"},{"text":"70%","value":"B"},{"text":"80%","value":"C"},{"text":"90%","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":38107,"question":"Organic compounds contain:","choices":[{"text":"ionic bond","value":"A"},{"text":"Covalent bond","value":"B"},{"text":"Metallic bond","value":"C"},{"text":"Co-ordinate covalent","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":38106,"question":"Aromatic compounds are given this name because of;","choices":[{"text":"smell they have","value":"A"},{"text":"slippery touch they have","value":"B"},{"text":"bitter taste they have","value":"C"},{"text":"sour taste they have","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":38105,"question":"Open chain compounds are also called:","choices":[{"text":"aliphatic compounds","value":"A"},{"text":"alicyclic compounds","value":"B"},{"text":"aromatic compounds","value":"C"},{"text":"hydrocarbons","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":38104,"question":"Chemical formula for urea is:","choices":[{"text":"NH4CNO","value":"A"},{"text":"NH4CH","value":"B"},{"text":"NH2CONH2","value":"C"},{"text":"NH4CI","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":38103,"question":"Who put forward '' the vital force theory''?","choices":[{"text":"Kolbe","value":"A"},{"text":"Wohler","value":"B"},{"text":"Berzellius","value":"C"},{"text":"Jabir - Bin - Hayan","value":"D"},{"value":"E"}],"correctAnswer":3}]