[{"id":60387,"question":"The most abundant isotope of neon is:","choices":[{"text":"Neon 21","value":"A"},{"text":"Neon 20","value":"B"},{"text":"Neon 22","value":"C"},{"text":"None of above","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":60386,"question":"Both xenon and caesium each have:","choices":[{"text":"41 isotopes","value":"A"},{"text":"36 isotopes","value":"B"},{"text":"43 isotopes&nbsp;","value":"C"},{"text":"33 isotopes","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":60384,"question":"The total charge of any nucleus is:","choices":[{"text":"Ze","value":"A"},{"text":"Z","value":"B"},{"text":"Both a and b","value":"C"},{"text":"None of above","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":60383,"question":"The mass of proton in amu is:","choices":[{"text":"1.07276","value":"A"},{"text":"1.7276","value":"B"},{"text":"1.007276","value":"C"},{"text":"1.0007276","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":60382,"question":"amu =","choices":[{"text":"1.06 x 10<sup>-27</sup> kg","value":"A"},{"text":"1.6606 x 10<sup>-27</sup> kg&nbsp;","value":"B"},{"text":"1.520 x 10<sup>-21</sup> kg","value":"C"},{"text":"1.6606 x 10<sup>-31</sup> kg","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":60381,"question":"The mass of protons is:","choices":[{"text":"1.675 x 10<sup>-27</sup> kg","value":"A"},{"text":"1.693 x 10<sup>-27</sup> kg","value":"B"},{"text":"1.673 x 10<sup>-31</sup> kg","value":"C"},{"text":"1.673 x 10<sup>-27</sup> kg&nbsp;","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":60380,"question":"The scientist who suggested the presence of neutron was:","choices":[{"text":"Bohr","value":"A"},{"text":"Rutherford","value":"B"},{"text":"Chadwick","value":"C"},{"text":"J.J Thomson","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":2586,"question":"Low level radiations effects","choices":[{"text":"Less of hair","value":"A"},{"text":"Ulceration","value":"B"},{"text":"Drop of white blood 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is","choices":[{"text":"Roentgen","value":"A"},{"text":"Grey","value":"B"},{"text":"Rem","value":"C"},{"text":"Curie","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":2578,"question":"The potential difference between the top and bottom of a cloud chamber is of the order of","choices":[{"text":"290 v","value":"A"},{"text":"400 v","value":"B"},{"text":"1 kv","value":"C"},{"text":"None of above","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":2577,"question":"In Wilson cloud chamber, ß-particles leave","choices":[{"text":"Thin and continuous tracks","value":"A"},{"text":"Thick and continuous tracks","value":"B"},{"text":"No tracks","value":"C"},{"text":"Thin and discontinuous tracks","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":2575,"question":"The first atomic reactor was introduced by","choices":[{"text":"Currie","value":"A"},{"text":"Enrico Fermi","value":"B"},{"text":"Newton","value":"C"},{"text":"Bohr","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":2574,"question":"The SI unit of decay constant is","choices":[{"text":"m","value":"A"},{"text":"m<sup>-1</sup>","value":"B"},{"text":"S<sup>-1</sup>","value":"C"},{"text":"Nm<sup>-1</sup>","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":2573,"question":"The radioactive decay obeys the law","choices":[{"text":"","img":"2573_5-a.jpg","value":"A"},{"text":"","img":"2573_5-b.jpg","value":"B"},{"text":"","img":"2573_5-c.jpg","value":"C"},{"text":"","img":"2573_5-d.jpg","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":2571,"question":"Radioactivity happen due to the disintegration of","choices":[{"text":"Nucleus","value":"A"},{"text":"Mass","value":"B"},{"text":"Electrons","value":"C"},{"text":"Protons","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":2570,"question":"1 amu is equal to","choices":[{"text":"1.0606 x 10<sup>-27</sup> kg","value":"A"},{"text":"1.66 x 10<sup>-31</sup> kg","value":"B"},{"text":"1.66 x 10<sup>-34</sup> kg","value":"C"},{"text":"1.66 x 10<sup>-19</sup> kg","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":2568,"question":"The early Greeks believed that matter waves was","choices":[{"text":"Discrete","value":"A"},{"text":"Continuous","value":"B"},{"text":"Both continuous and discrete","value":"C"},{"text":"All of above","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":2567,"question":"Charge on an electron was determined by","choices":[{"text":"Ampere","value":"A"},{"text":"Millikan","value":"B"},{"text":"Maxwell","value":"C"},{"text":"Bohr","value":"D"},{"value":"E"}],"correctAnswer":2}]