[{"id":140037,"question":"If the solvent is inflammable for heating purpose we use","choices":[{"text":"Ice bath","value":"A"},{"text":"Water bath","value":"B"},{"text":"Wire gauze","value":"C"},{"text":"Thermostat","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":140036,"question":"Which one is not usually used for the crystallization?","choices":[{"text":"Acetone","value":"A"},{"text":"Acetic acid","value":"B"},{"text":"Sulphuric acid","value":"C"},{"text":"Chloroform","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":140035,"question":"Which one is the property of an ideal solvent?","choices":[{"text":"Should be expensive","value":"A"},{"text":"It should react chemically with the solute","value":"B"},{"text":"Impurities should crystallize along with the solute","value":"C"},{"text":"Should be safe to use","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":140034,"question":"Gooch Crucible used to filter the solution of","choices":[{"text":"H<sub>2</sub>SO<sub>4</sub>","value":"A"},{"text":"HCI","value":"B"},{"text":"KMnO<sub>4</sub>","value":"C"},{"text":"Both B &amp; C","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":140033,"question":"Gooch crucible is used for the filtration of precipitates having","choices":[{"text":"High Solubility","value":"A"},{"text":"High concentration","value":"B"},{"text":"High ignition temperature","value":"C"},{"text":"Low Temperature","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":140032,"question":"By using the fluted filter paper rate of filtration is","choices":[{"text":"Increased","value":"A"},{"text":"Decreased","value":"B"},{"text":"Filtration is constant","value":"C"},{"text":"Having no effect","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":140031,"question":"During the folding of filter paper the apex form angle of about","choices":[{"text":"80°","value":"A"},{"text":"60°","value":"B"},{"text":"180°","value":"C"},{"text":"90°","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":140030,"question":"The pore size of filter paper depends upon","choices":[{"text":"Nature of the medium","value":"A"},{"text":"Temperature of the medium","value":"B"},{"text":"Size of particles","value":"C"},{"text":"Mass of the particles","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":140029,"question":"Which of the following process is used to separate insoluble particles from liquids?","choices":[{"text":"Seperation","value":"A"},{"text":"Filtration","value":"B"},{"text":"Crystallization","value":"C"},{"text":"Condensation","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":140028,"question":"Which of the following is directly related to Qualitative analysis?","choices":[{"text":"Identification","value":"A"},{"text":"Separation","value":"B"},{"text":"Measurement","value":"C"},{"text":"Calculation","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":140027,"question":"If N<sub>A</sub>is Avogadro's number, then number of valence electrons in 4.2 g of nitride ions N<sup>3-</sup>is","choices":[{"text":"2.4 N<sub>A</sub>","value":"A"},{"text":"4.2 N<sub>A</sub>","value":"B"},{"text":"1.6 N<sub>A</sub>","value":"C"},{"text":"3.2 N<sub>A</sub>","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":140026,"question":"2 g of oxygen contains number of atoms equal to that in","choices":[{"text":"0.5 g of hydrogen","value":"A"},{"text":"4 g of sulphur","value":"B"},{"text":"7 g of nitrogen","value":"C"},{"text":"2.3 g of sodium","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":140025,"question":"The total number of protons in 10 g of calcium carbonate is (N<sub>0</sub>= 6.023 x 10<sup>23</sup>)","choices":[{"text":"1.5057 x 10<sup>24</sup>","value":"A"},{"text":"2.0478 x 10<sup>24</sup>","value":"B"},{"text":"3.0115 x 10<sup>24</sup>","value":"C"},{"text":"4.0956 x 10<sup>24</sup>","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":140024,"question":"The number of oxygen atoms in 4.4 g of CO<sub>2 </sub>is approximately","choices":[{"text":"1.2 x 10<sup>23</sup>","value":"A"},{"text":"6 x 10<sup>22</sup>","value":"B"},{"text":"6 x 10<sup>23</sup>","value":"C"},{"text":"12 x 10<sup>23</sup>","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":140023,"question":"The number of atoms contained in 11.2 L of SO<sub>2</sub>at S.T.P are","choices":[{"text":"3/2 x 6.02 x 10<sup>23</sup>","value":"A"},{"text":"2 x 6.02 x 10<sup>23</sup>","value":"B"},{"text":"6.02 x 10<sup>23</sup>","value":"C"},{"text":"4 x 6.02 x 10<sup>23</sup>","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":140022,"question":"How many moles of Helium gas occupy 22.4 L at 0°C at a atm. Pressure?","choices":[{"text":"0.11","value":"A"},{"text":"0.90","value":"B"},{"text":"1.0","value":"C"},{"text":"1.11","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":140021,"question":"1 mole of CH<sub>4</sub>contains","choices":[{"text":"6.02 x 10<sup>23</sup>atoms of H","value":"A"},{"text":"4 g-atom of hydrogen","value":"B"},{"text":"1.81 x 10<sup>23</sup>molecules of CH<sub>4</sub>","value":"C"},{"text":"3.0 g of carbon","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":140020,"question":"Which of the following has least mass?","choices":[{"text":"2 gram atom of nitrogen","value":"A"},{"text":"3 x 10<sup>23</sup>atoms of C","value":"B"},{"text":"1 mole of S","value":"C"},{"text":"7.0 g of Ag.","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":140019,"question":"What quantity of limestone (CaCO<sub>3</sub>) on heating will give 56 kg of CaO?","choices":[{"text":"1000 kg","value":"A"},{"text":"56 kg","value":"B"},{"text":"44 kg","value":"C"},{"text":"100 kg","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":140018,"question":"The percentage of oxygen in NaOH is","choices":[{"text":"40","value":"A"},{"text":"60","value":"B"},{"text":"8","value":"C"},{"text":"10","value":"D"},{"value":"E"}],"correctAnswer":1}]