[{"id":140082,"question":"<span style=\"color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 18px; background-color: rgb(255, 255, 248);\"><i>ΔH<sub>neutralisation</sub>is always</i></span>","choices":[{"text":"positive","value":"A"},{"text":"Negative","value":"B"},{"text":"Zero","value":"C"},{"text":"Positive or negative","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":140081,"question":"The heat evolved in combustion of rhombic and monoclinic sulphur are -70960 and -71030 cal mol<sup>-1</sup>respectively. What will be heat of conversion of rhombic sulphur to monoclinic?","choices":[{"text":"70960 calories","value":"A"},{"text":"71030 calories","value":"B"},{"text":"-70 calories","value":"C"},{"text":"+70 calories","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":140080,"question":"Hess's law deals with","choices":[{"text":"Changes in heat or reaction","value":"A"},{"text":"Rate of reaction","value":"B"},{"text":"Equilibrium constant","value":"C"},{"text":"Influence of pressure on volume of a gas.","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":140079,"question":"An endothermic reaction is one in which the reacting substances","choices":[{"text":"Have more energy than the products","value":"A"},{"text":"Have less energy than the products","value":"B"},{"text":"Have the same energy as the products","value":"C"},{"text":"Are at a higher temperature than the products.","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":140078,"question":"Which of the following units represents largest amount of energy?","choices":[{"text":"Calorie","value":"A"},{"text":"Joule","value":"B"},{"text":"Erg","value":"C"},{"text":"Electron vol.","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":140077,"question":"Evaporation of water is","choices":[{"text":"An exothermic change","value":"A"},{"text":"an endothermic change","value":"B"},{"text":"A process where no heat changes occur","value":"C"},{"text":"A process accompanied by chemical reaction.","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":140076,"question":"Inter molecular forces in solid hydrogen are","choices":[{"text":"Covalent forces","value":"A"},{"text":"Van der Waal forces or London dispersion forces","value":"B"},{"text":"Hydrogen bonds","value":"C"},{"text":"All of these.","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":140075,"question":"According to MO theory, the species O<sup>+</sup><sub>2</sub>","choices":[{"text":"Bond order of 2.5","value":"A"},{"text":"Three unpaired electrons","value":"B"},{"text":"Diamagnetic character","value":"C"},{"text":"Stability lower then O<sub>2</sub>","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":140074,"question":"The bond angle H-O-H in ice is closest to","choices":[{"text":"120<span style=\"color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 18px; background-color: rgb(255, 255, 248);\">° . 28'</span>","value":"A"},{"text":"60<span style=\"font-family: &quot;Times New Roman&quot;; font-size: 18px; color: rgb(34, 34, 34); background-color: rgb(255, 255, 248);\">°</span>","value":"B"},{"text":"90<span style=\"font-family: &quot;Times New Roman&quot;; font-size: 18px; color: rgb(34, 34, 34); background-color: rgb(255, 255, 248);\">°</span>","value":"C"},{"text":"109<span style=\"font-family: &quot;Times New Roman&quot;; font-size: 18px; color: rgb(34, 34, 34); background-color: rgb(255, 255, 248);\">°</span>","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":140073,"question":"The carbon atoms in calcium carbide are held by","choices":[{"text":"Ionic bonds","value":"A"},{"text":"Sigma bonds","value":"B"},{"text":"2 covalent, one co-ordinate bond","value":"C"},{"text":"<i>2</i><span style=\"color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 224);\"><i>π</i> <i>and one</i></span><span style=\"color: rgb(34, 34, 34); font-family: &quot;Times New Roman&quot;; font-size: 24px; text-align: center; background-color: rgb(255, 255, 248);\"><i>α bond</i></span>","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":140072,"question":"Outermost shells of two elements X and Y have two and six electrons respectively. If they combine, the expected formula of compound will be","choices":[{"text":"XY","value":"A"},{"text":"X<sub>2</sub>Y","value":"B"},{"text":"X<sub>2</sub>Y<sub>3</sub>","value":"C"},{"text":"XY<sub>2</sub>","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":140071,"question":"Which of the following geometry is associated with the compound in which the central atom assumes sp<sup>3</sup>d hybridization?","choices":[{"text":"Planar","value":"A"},{"text":"Pyramidal","value":"B"},{"text":"Angular","value":"C"},{"text":"Trigonal bipyramidal","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":140070,"question":"Covalent compounds are soluble in","choices":[{"text":"Polar solvents","value":"A"},{"text":"Non-polar solvents","value":"B"},{"text":"Concentrated acids","value":"C"},{"text":"All solvents","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":140069,"question":"Among the alkaline earth metals the element forming predominantly covalent compounds is","choices":[{"text":"Be","value":"A"},{"text":"Mg","value":"B"},{"text":"Sr","value":"C"},{"text":"Calcium","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":140068,"question":"Hydrogen chloride molecule contains","choices":[{"text":"Covalent bond","value":"A"},{"text":"Double bond","value":"B"},{"text":"Co-ordinate bond","value":"C"},{"text":"Electrovalent bond","value":"D"},{"value":"E"}],"correctAnswer":1}]