[{"id":267020,"question":"Carbon -14 is used for the","choices":[{"text":"Growth of bones","value":"A"},{"text":"Diagonosis of goiter","value":"B"},{"text":"Age determination of old objects","value":"C"},{"text":"All of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":267019,"question":"Whcih Isotopes is used for diagonosis of goiter?","choices":[{"text":"Iodine-131","value":"A"},{"text":"Cobalt -60","value":"B"},{"text":"P-32","value":"C"},{"text":"Sr-90","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":267018,"question":"The percentage of <sup>238</sup> U <sub>92</sub> found in nature.","choices":[{"text":"97%","value":"A"},{"text":"0.72%","value":"B"},{"text":"98%","value":"C"},{"text":"1.5%","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":267017,"question":"<sup>13</sup> C and <sup>14</sup> C are both present in nature.","choices":[{"text":"0,1 %","value":"A"},{"text":"1.1 %","value":"B"},{"text":"0.9 %","value":"C"},{"text":"1.5 %","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":267016,"question":"Number of isotopes of hydrogen is","choices":[{"text":"2","value":"A"},{"text":"5","value":"B"},{"text":"4","value":"C"},{"text":"3","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":267015,"question":"Which Isotopes is commonly used to irradiate cancer cells.","choices":[{"text":"Cobalt -60","value":"A"},{"text":"Iodine-23","value":"B"},{"text":"Carbon -14","value":"C"},{"text":"Iodine-131","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":267014,"question":"Chlorine has two isotopes, both of which have","choices":[{"text":"Same mass Number","value":"A"},{"text":"Same number of electrons","value":"B"},{"text":"Same number of neurtons","value":"C"},{"text":"Different number of protons","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":267013,"question":"Which isotope is used in nuclear reactors.","choices":[{"text":"U-234","value":"A"},{"text":"U-235","value":"B"},{"text":"U-238","value":"C"},{"text":"All of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":267012,"question":"Which of the following statement is not correct about isotopes.","choices":[{"text":"they have same atomic number","value":"A"},{"text":"They have same number of protons","value":"B"},{"text":"They have same physical properties","value":"C"},{"text":"They have same chemical propeties","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":267011,"question":"Mass Number is repreented by","choices":[{"text":"Z","value":"A"},{"text":"S","value":"B"},{"text":"A","value":"C"},{"text":"M","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":267010,"question":"<sup>238</sup>U<sub>92</sub> has number of neutrons.","choices":[{"text":"92","value":"A"},{"text":"146","value":"B"},{"text":"238","value":"C"},{"text":"330","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":267009,"question":"Atomic number is represented by","choices":[{"text":"P","value":"A"},{"text":"A","value":"B"},{"text":"At","value":"C"},{"text":"Z","value":"D"},{"value":"E"}],"correctAnswer":4}]