[{"id":110236,"question":"The volume occupied by 1.4 g of N<sub>2 </sub>at S.T.P is","choices":[{"text":"2.24 dm<sup>3</sup>","value":"A"},{"text":"22.4 dm<sup>3</sup>","value":"B"},{"text":"1.12 dm<sup>3</sup>","value":"C"},{"text":"112 cm<sup>3</sup>","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":110234,"question":"0.5 mole of CH<sub>4</sub>and 0.5 mole of SO<sub>2</sub>gases have equal","choices":[{"text":"Volume","value":"A"},{"text":"Mass is gram","value":"B"},{"text":"Total number of atoms","value":"C"},{"text":"Number of molecules","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":110232,"question":"What is the volume in cm<sup>3</sup>of 3.01 x 10<sup>23</sup>molecules of O<sub>2</sub>gas at S.T.P","choices":[{"text":"1000 cm<sup>3</sup>","value":"A"},{"text":"11000 cm<sup>3</sup>","value":"B"},{"text":"1120 cm<sup>3</sup>","value":"C"},{"text":"11200 cm<sup>3</sup>","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":110229,"question":"The mass of one mole of proton is","choices":[{"text":"1.008 g","value":"A"},{"text":"0.184 g","value":"B"},{"text":"1.673 g","value":"C"},{"text":"1.008 mg","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":110228,"question":"The largest number of molecules are present in","choices":[{"text":"3.6 g of H<sub>2</sub>O","value":"A"},{"text":"4.8 g of C<sub>2</sub>H<sub>5</sub>OH","value":"B"},{"text":"2.8 g of CO","value":"C"},{"text":"5.4 g of N<sub>2</sub>O<sub>5</sub>","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":110226,"question":"One mole of SO<sub>2</sub>contains","choices":[{"text":"6.02 x 10<sup>23</sup>atoms of oxygen","value":"A"},{"text":"18.1 x 10<sup>23</sup>, molecules of SO<sub>2</sub>","value":"B"},{"text":"6.02 x 10<sup>23 </sup>atoms of sulphur","value":"C"},{"text":"4 gram atoms of SO<sub>2</sub>","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":110222,"question":"3.01 x 10<sup>22</sup>Ag<sup>+</sup>ions is present in","choices":[{"text":"85 grams AgNO<sub>3</sub>","value":"A"},{"text":"0.85 g AgNO<sub>3</sub>","value":"B"},{"text":"8.5 g AgNO<sub>3</sub>","value":"C"},{"text":"18.5 g AgNO<sub>3</sub>","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":110220,"question":"When nitrogen is 5.6 grams in NO<sub>2</sub>. then number of moles of NO<sub>2</sub>is","choices":[{"text":"0.5","value":"A"},{"text":"0.4","value":"B"},{"text":"0.04","value":"C"},{"text":"0.05","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":110219,"question":"A ring contains 3 gram diamond. The number of C-atoms which a ring contains is","choices":[{"text":"3.01 x 10<sup>23</sup>","value":"A"},{"text":"1.5 x 10<sup>23</sup>","value":"B"},{"text":"6.02 x 10<sup>24</sup>","value":"C"},{"text":"3.01 x 10<sup>24</sup>","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":110217,"question":"One mole of C<sub>2</sub>H<sub>5</sub>OH contains the number of H-atoms","choices":[{"text":"6.02 x 10<sup>23</sup>","value":"A"},{"text":"3.61 x 10<sup>24</sup>","value":"B"},{"text":"1.81 x 10<sup>24</sup>","value":"C"},{"text":"6.02 x 10<sup>24</sup>","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":110215,"question":"A balloon contains 0.02 gram of H<sub>2</sub>gas, it contains H<sub>2</sub>molecules","choices":[{"text":"6.02 x 10<sup>23</sup>","value":"A"},{"text":"3.01 x 10<sup>22</sup>","value":"B"},{"text":"6.02 x 10<sup>21</sup>","value":"C"},{"text":"3.01 x 10<sup>21</sup>","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":110213,"question":"How many moles of hydrogen atoms does 3.2 g of methane, CH<sub>4</sub>, contain?","choices":[{"text":"0.02","value":"A"},{"text":"0.2","value":"B"},{"text":"0.4","value":"C"},{"text":"0.8","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":110212,"question":"A compound contains 75% carbon and 25% hydrogen, by mass. What is the molecular formula of the compound/","choices":[{"text":"C<sub>3</sub>H<sub>8</sub>","value":"A"},{"text":"CH<sub>4</sub>","value":"B"},{"text":"C<sub>2</sub>H<sub>4</sub>","value":"C"},{"text":"C<sub>2</sub>H<sub>6</sub>","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":110210,"question":"Two different hydrocarbon each contain the same percentage by mass of hydrogen. It follows that they have the same","choices":[{"text":"Empirical formula","value":"A"},{"text":"Number of atoms in a molecules","value":"B"},{"text":"Number of isomers","value":"C"},{"text":"Relative molecular mass","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":110209,"question":"A compound X contains 50% sulphur and 50% oxygen by mass. What is the empirical formula of compound X?","choices":[{"text":"SO","value":"A"},{"text":"SO<sub>2</sub>","value":"B"},{"text":"SO<sub>3</sub>","value":"C"},{"text":"SO<sub>4</sub>","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":110207,"question":"One mole of ethanol and one mole of ethane have an equal","choices":[{"text":"Mass","value":"A"},{"text":"Number of atoms","value":"B"},{"text":"Number of electrons","value":"C"},{"text":"Number of molecules","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":110206,"question":"Which has greater number of moles","choices":[{"text":"0.1 g sodium","value":"A"},{"text":"6.02 x 10<sup>20</sup>atoms of magnesium","value":"B"},{"text":"20 cm<sup>3</sup>0.1<sup></sup>mole per dm<sup>3</sup>of NaOH","value":"C"},{"text":"12.2 dm<sup>3</sup>of nitrogen at standard<div>[A<sub>r</sub>Na = 23, Mg = 24, O = 16]</div>","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":110205,"question":"A compound having empirical formula C<sub>3</sub>H<sub>3</sub>O and its molecular mass is 110.02. Its molecular formula is","choices":[{"text":"C<sub>3</sub>H<sub>3</sub>O","value":"A"},{"text":"C<sub>6</sub>H<sub>6</sub>O<sub>2</sub>","value":"B"},{"text":"C<sub>9</sub>H<sub>9</sub>O<sub>3</sub>","value":"C"},{"text":"C<sub>3</sub>H<sub>6</sub>O<sub>2</sub>","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":110204,"question":"A compound contains one atom of oxygen and % of O 34.78, then molecular mass of compound is","choices":[{"text":"46","value":"A"},{"text":"78","value":"B"},{"text":"110","value":"C"},{"text":"180","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":110203,"question":"The percentage of which element in the organic compound is determined by the difference method","choices":[{"text":"Carbon","value":"A"},{"text":"Hydrogen","value":"B"},{"text":"Nitrogen","value":"C"},{"text":"Oxygen","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":110202,"question":"The value of R(General Gas Constant) is","choices":[{"text":"<p class=\"MsoNormal\"><span style=\"font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;\">8.3134 JK</span><sup><span style=\"font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif;\">-1</span></sup><span style=\"font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;\">mole</span><sup><span style=\"font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif;\">-1</span></sup></p><p class=\"MsoNormal\"><sup><span style=\"font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif;\"><o:p></o:p></span></sup></p>","value":"A"},{"text":"<p class=\"MsoNormal\"><span style=\"font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;\">1.987 Cal K</span><sup><span style=\"font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif;\">-1</span></sup><span style=\"font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;\">Mole</span><sup><span style=\"font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif;\">-1<o:p></o:p></span></sup></p>","value":"B"},{"text":"Both a and b","value":"C"},{"text":"<p class=\"MsoNormal\"><span style=\"font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;\">1.987 JK</span><sup><span style=\"font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif;\">-1</span></sup><span style=\"font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;\">mole</span><sup><span style=\"font-size: 10.5pt; line-height: 107%; font-family: Arial, sans-serif;\">-1</span></sup><o:p></o:p></p>","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":110201,"question":"The empirical formula of a liquid compound is known to be C<sub>2</sub>H<sub>4</sub>O. What other information is needed to work out its molecular formula?","choices":[{"text":"The percentage composition of the compound","value":"A"},{"text":"The relative molecular mass of the compound","value":"B"},{"text":"The density of the compound","value":"C"},{"text":"The volume occupied by one mole of the compound","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":110200,"question":"Which one of the following compounds does not have the empirical formula CH<sub>2</sub>O?","choices":[{"text":"Ethanoic acid, CH<sub>3</sub>CO<sub>2</sub>H","value":"A"},{"text":"Ethanol, CH<sub>3</sub>CH<sub>2</sub>OH","value":"B"},{"text":"Glucose, C<sub>6</sub>H<sub>12</sub>O<sub>6</sub>","value":"C"},{"text":"Methanal, HCHO","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":110199,"question":"Which of the following compounds contains the highest percentage by mass of nitrogen?","choices":[{"text":"Ammonia, NH<sub>3</sub>","value":"A"},{"text":"Ammonium carbamate, NH<sub>2</sub>CO<sub>2</sub>NH<sub>4</sub>","value":"B"},{"text":"Ammonium carbonate, (NH<sub>4</sub>)<sub>2</sub>CO<sub>3</sub>","value":"C"},{"text":"Hydrazine, N<sub>2</sub>H<sub>4</sub>","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":110197,"question":"Which of the following statements is not true?","choices":[{"text":"Isotopes with even atomic masses are comparatively abundant","value":"A"},{"text":"Isotopes with even atomic masses are comparatively abundant","value":"B"},{"text":"Isotopes with even atomic masses and even atomic numbers are comparatively abundant","value":"C"},{"text":"Isotopes with even atomic masses and odd atomic number are comparatively abundant","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":110194,"question":"Isotopes differ in the","choices":[{"text":"Number of neutrons","value":"A"},{"text":"Number of protons","value":"B"},{"text":"Number of electrons","value":"C"},{"text":"Number of atoms","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":110192,"question":"The relative abundance of the ions with a definite m/e value is measured by","choices":[{"text":"High pressure of vapours","value":"A"},{"text":"Strength of electric current measured","value":"B"},{"text":"Quantity of fast moving electrons","value":"C"},{"text":"Electron gas","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":110190,"question":"The pressure of vapours when sent to the ionization chamber in mass spectrometer is","choices":[{"text":"10<sup>-5</sup>to 10<sup>-6</sup>torr","value":"A"},{"text":"10<sup>-6</sup>to 10<sup>-7</sup>torr","value":"B"},{"text":"10<sup>-7</sup>to 10<sup>-8</sup>torr","value":"C"},{"text":"10<sup>-3</sup>to 10<sup>-4</sup>torr","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":110188,"question":"The relative abundance of Pb isotopes is 1.5% Pb<sup>204</sup>, 23.6% Pb<sup>206</sup>, 22.6% Pb<sup>207</sup>, 52.3% Pb<sup>208</sup>The relative atomic mass of Pb is","choices":[{"text":"207.94","value":"A"},{"text":"208.24","value":"B"},{"text":"206.94","value":"C"},{"text":"207.24","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":110185,"question":"The empirical formula of a compound is CH<sub>2</sub>O. What may be the compound","choices":[{"text":"C<sub>2</sub>H<sub>5</sub>OH","value":"A"},{"text":"C<sub>6</sub>H<sub>5</sub>OH","value":"B"},{"text":"HCOOH","value":"C"},{"text":"","img":"110185_636314846389794920-RA4.jpg","value":"D"},{"value":"E"}],"correctAnswer":4}]