[{"id":119425,"question":"Isotopes of an element differ in","choices":[{"text":"Number of protons","value":"A"},{"text":"Number of electrons","value":"B"},{"text":"Number of neutrons","value":"C"},{"text":"Number of electrons and protons","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":119424,"question":"The phenomenon of isotropy was first discovered by","choices":[{"text":"Soddy","value":"A"},{"text":"Rutherford","value":"B"},{"text":"Bohr","value":"C"},{"text":"Dalton","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":119423,"question":"The isotopes of an element","choices":[{"text":"Possess same mass number","value":"A"},{"text":"Possess same number of protons","value":"B"},{"text":"Do not possess same chemical properties","value":"C"},{"text":"May or may not possess same chemical properties","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":119422,"question":"The negatively charged particles are called","choices":[{"text":"Cation","value":"A"},{"text":"Radical","value":"B"},{"text":"Anion","value":"C"},{"text":"Positron","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":119420,"question":"Macromolecules are","choices":[{"text":"organic molecules","value":"A"},{"text":"High molecular mass molecules ","value":"B"},{"text":"Natural compounds","value":"C"},{"text":"Rarely occurring molecules","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":119419,"question":"","questionImage":"119419_636336455833314457-RQ.jpg","choices":[{"text":"8 g","value":"A"},{"text":"16 g","value":"B"},{"text":"32 g","value":"C"},{"text":"24 g","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":119416,"question":"The number of moles of CO2which contain 8.0 g of oxygen","choices":[{"text":"0.25","value":"A"},{"text":"0.50","value":"B"},{"text":"1.0","value":"C"},{"text":"1.50","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":119415,"question":"","questionImage":"119415_636336455004603703-RQ.jpg","choices":[{"text":"99.2%","value":"A"},{"text":"99.5%","value":"B"},{"text":"90.5%","value":"C"},{"text":"96.2%","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":119413,"question":"","questionImage":"119413_636336454475162815-RQ.jpg","choices":[{"text":"84.84 %","value":"A"},{"text":"89.89%","value":"B"},{"text":"81.81%","value":"C"},{"text":"90.90%","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":119409,"question":"0.5 mole of CH4and 0.5 mole of SO2gases have equal","choices":[{"text":"Volume","value":"A"},{"text":"Mass in grams","value":"B"},{"text":"Total number of atoms","value":"C"},{"text":"Number of molecules","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":119407,"question":"One of the following statements is incorrect","choices":[{"text":"Actual yeild is always less than the theoretical yield","value":"A"},{"text":"The formula of a compound is not definite","value":"B"},{"text":"Law of conservation of mass is applied in stoictiometry","value":"C"},{"text":"Boyles law is applied in stoichiometry","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":119405,"question":"The quantitative relationship between the substances according to balanced equation describes","choices":[{"text":"Reversible reactions","value":"A"},{"text":"Stoichiometry","value":"B"},{"text":"Limiting reacting","value":"C"},{"text":"Percentage composition","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":119403,"question":"","questionImage":"119403_636336448941308501-RQ.jpg","choices":[{"text":"N<sub>2</sub>O<sub>4</sub>is limiting reactant","value":"A"},{"text":"N<sub>2</sub>H<sub>4</sub>is the limiting reactant","value":"B"},{"text":"Reactants are completely converted to the products","value":"C"},{"text":"Reactions is reversible","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":119402,"question":"Which one of the following step is not involved in determination of empirical formula","choices":[{"text":"Determination % of each element","value":"A"},{"text":"Determination of gram atom of each element","value":"B"},{"text":"Determination of isotopes of each element","value":"C"},{"text":"Determination of atomic ratio of element","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":119401,"question":"A beaker contains 9 grams of water. The number of H-atoms is","choices":[{"text":"6.02 x 1023","value":"A"},{"text":"3.01 x 1023","value":"B"},{"text":"6.02 x 1024","value":"C"},{"text":"3.01 x 1024","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":119400,"question":"1.12 dm<sup>3</sup>of N<sub>2</sub>gas at S.T.P. has mass of N<sub>2</sub>gas","choices":[{"text":"2.8 g","value":"A"},{"text":"2.4 g","value":"B"},{"text":"1.4 g","value":"C"},{"text":"14 g","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":119397,"question":"","questionImage":"119397_636336444791007671-RQ.jpg","choices":[{"text":"32 g","value":"A"},{"text":"3.2 g","value":"B"},{"text":"5.6 g","value":"C"},{"text":"9.6 g","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":119395,"question":"The mass of Al<sub>2</sub>S<sub>3</sub>formed when 20 grams Al reacts completely with S is","choices":[{"text":"60 g","value":"A"},{"text":"50 g","value":"B"},{"text":"50.55 g","value":"C"},{"text":"55.55 g","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":119394,"question":"The mass of sulphur which combines with 24 grams oxygen to form SO<sub>2</sub>","choices":[{"text":"32 gram","value":"A"},{"text":"24 gram","value":"B"},{"text":"8 gram","value":"C"},{"text":"12 gram","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":110272,"question":"A limiting reactant is one which according to the stoichiometric equation","choices":[{"text":"Has excess mass","value":"A"},{"text":"Has least mass","value":"B"},{"text":"Has excess number of moles","value":"C"},{"text":"Has least number of moles","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":110270,"question":"The amount of products obtained from the balanced chemical equation is regarded as","choices":[{"text":"Theoretical yield","value":"A"},{"text":"Actual yield","value":"B"},{"text":"% yield","value":"C"},{"text":"Experimental yield","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":110268,"question":"","questionImage":"110268_636314948613508296-RQ.jpg","choices":[{"text":"","img":"110268_636314948613508296-RA1.jpg","value":"A"},{"text":"","img":"110268_636314948613508296-RA2.jpg","value":"B"},{"text":"","img":"110268_636314948613508296-RA3.jpg","value":"C"},{"text":"","img":"110268_636314948613508296-RA4.jpg","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":110265,"question":"When 0.1 g of magnesium is treated with an excess of hydrochloric acid, what volume of gas at room temperature and pressure will be produced","choices":[{"text":"10 cm<sup>3</sup>","value":"A"},{"text":"25 cm<sup>3</sup>","value":"B"},{"text":"48 cm<sup>3</sup>","value":"C"},{"text":"100 cm<sup>3</sup>","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":110263,"question":"If four moles of sulpur dioxide are oxidised to sulphur trioxide, how many moles of oxygen molecules are required","choices":[{"text":"0.5","value":"A"},{"text":"1.0","value":"B"},{"text":"1.5","value":"C"},{"text":"2.0","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":110262,"question":"What is the maximum mass of aluminium which can be obtained from 240g of aluminium oxide Al<sub>2</sub>O<sub>3</sub>?","choices":[{"text":"26 g","value":"A"},{"text":"127 g","value":"B"},{"text":"51 g","value":"C"},{"text":"108 g","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":110260,"question":"How many moles of oxygen, O<sub>2</sub>are needed for the complete combustion of two moles of butane C<sub>4</sub>H<sub>10</sub>?","choices":[{"text":"2","value":"A"},{"text":"8","value":"B"},{"text":"10","value":"C"},{"text":"13","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":110258,"question":"","questionImage":"110258_636314942347647225-RQ.jpg","choices":[{"text":"0 dm<sup>3</sup>","value":"A"},{"text":"3 dm<sup>3</sup>","value":"B"},{"text":"2 dm<sup>3</sup>","value":"C"},{"text":"3 dm<sup>3</sup>","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":110244,"question":"","questionImage":"110244_636314917267768419-RQ.jpg","choices":[{"text":"300 cm<sup>3</sup>","value":"A"},{"text":"200 cm<sup>3</sup>","value":"B"},{"text":"150 cm<sup>3</sup>","value":"C"},{"text":"100 cm<sup>3</sup>","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":110239,"question":"Who one mole of each of the following is completely burned in oxygen, which gives the largest mass of carbon dioxide?","choices":[{"text":"Carbon monoxide","value":"A"},{"text":"Diamond","value":"B"},{"text":"Ethane","value":"C"},{"text":"Methane","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":110238,"question":"A limiting reactant is the one which","choices":[{"text":"Is taken in lesser quantity in grams as compared to other reactants","value":"A"},{"text":"Is taken in lesser quantity in volume as compared to other reactants","value":"B"},{"text":"Gives the maximum amount of the product which is required","value":"C"},{"text":"Gives the minimum amount of the product under consideration","value":"D"},{"value":"E"}],"correctAnswer":4}]