[{"id":140233,"question":"Which species represents the electrpohile in aromatic nitrotaion?","choices":[{"text":"NO<sup>-</sup><sub>2</sub>","value":"A"},{"text":"NO<sup>+</sup><sub>2</sub>","value":"B"},{"text":"NO2","value":"C"},{"text":"NO<sup>-</sup><sub>3</sub>","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":140232,"question":"Which reaction sequence would be best to prepare 3-chloro-aniline from benzene?","choices":[{"text":"Chlorination, nitration, reduction","value":"A"},{"text":"Nitration, Chlorination, reduction","value":"B"},{"text":"Nitration, reduction, chlorination","value":"C"},{"text":"Nitration, reduction, acylation, chorination, hydrolysis","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":140231,"question":"Most common reactions of benzene and its derivatives are","choices":[{"text":"Electrophilic addition reactions","value":"A"},{"text":"Electrophilic subsitution reactions","value":"B"},{"text":"Nucleoophilic addition reactions","value":"C"},{"text":"Nucleophilic substitution reactions","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":140230,"question":"The reaction/method that does not give an alkane is","choices":[{"text":"Catalytic hydrogenation of alkanes","value":"A"},{"text":"Wurtz reaction","value":"B"},{"text":"Hydrolysis of alkyl magnesium bromide","value":"C"},{"text":"Dehydrohalogenation of an alkyl halide.","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":140229,"question":"Which of the following method is most appropriate for the manufacture of methane?","choices":[{"text":"By reduction of CH2SL2","value":"A"},{"text":"Wurtz reaction","value":"B"},{"text":"Liquification of natural gas","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":140228,"question":"The addition of HBr is easiest with","choices":[{"text":"CH2 = CHCl","value":"A"},{"text":"CICH = CHCl","value":"B"},{"text":"CH3 - CH = CH2","value":"C"},{"text":"(CH3)2 C = CH2","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":140227,"question":"In Friedal-Craft's alkylation besides AlCl<sub>3</sub>the other reactants are","choices":[{"text":"C6H6 + NH3","value":"A"},{"text":"C6H6 + CH4","value":"B"},{"text":"C6H6 + CH3Cl","value":"C"},{"text":"C6H6 + CH3COCl","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":140226,"question":"For preparing an alkane, a concentrated aqueous solution of sodium or potassium salt of saturated carboxylic acid is subjected to","choices":[{"text":"Hydrolysis","value":"A"},{"text":"Oxidation","value":"B"},{"text":"Hydrogenation","value":"C"},{"text":"Electrolysis","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":140225,"question":"Octane number is zero for","choices":[{"text":"n-Heptane","value":"A"},{"text":"Isooctane","value":"B"},{"text":"n-Hexane","value":"C"},{"text":"Isoheptane","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":140224,"question":"The IUPAC name of the compound having the formula (CH<sub>3</sub>)<sub>3</sub>C - CH = CH<sub>2</sub>is","choices":[{"text":"1, 1-Dimethyl-3-butene","value":"A"},{"text":"1, 1, 1-Trimethyl-3-propene","value":"B"},{"text":"3, 3,-Dimethyl-1-butene","value":"C"},{"text":"3, 3, 3,-Trimethyl-1-propene","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":140223,"question":"Which of the following substances is used as an antiknock compound?","choices":[{"text":"Tetraethyl lead","value":"A"},{"text":"Lead tetrachloride","value":"B"},{"text":"Lead acetate","value":"C"},{"text":"Ethyl acetate","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":140222,"question":"The order of reactivity of halogens in aliphatic substitution reactions is","choices":[{"text":"Br2 &gt; C12 &gt; F2","value":"A"},{"text":"Cl2 &gt; Br2 &gt; F2","value":"B"},{"text":"Cl2 C12 &gt; Br2","value":"C"},{"text":"F2 &gt; Br2 &gt; C12","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":140221,"question":"Acetylene gives","choices":[{"text":"White ppt. with ammonical AgNO<sub>3</sub>and red ppt. with ammonical Cu(NO<sub>3</sub>)<sub>2</sub>","value":"A"},{"text":"White ppt. with ammonical AgNo<sub>3 and red ppt. with ammonical</sub>Cu<sub>2</sub>Cl<sub>2</sub>","value":"B"},{"text":"White ppt. with both","value":"C"},{"text":"Red ppt. with both","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":140220,"question":"The essential component of organic compound is","choices":[{"text":"O","value":"A"},{"text":"C","value":"B"},{"text":"P","value":"C"},{"text":"N","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":140219,"question":"Wholer prepared urea from","choices":[{"text":"Ammonia","value":"A"},{"text":"NH<sub>4</sub>CNO","value":"B"},{"text":"NH<sub>3</sub>","value":"C"},{"text":"Uric acid","value":"D"},{"value":"E"}],"correctAnswer":2}]