[{"id":154587,"question":"The experimental evidences for the existence of atomic nucleus comes from:","choices":[{"text":"Line spectrum of hydrogen.","value":"A"},{"text":"Magnetic bonding of cathode rays.","value":"B"},{"text":"Millikan oil drop experiment.","value":"C"},{"text":"Scattering of alpha particles by thin metal foil.","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":154584,"question":"Anode is the surface on which probability of finding electron is:","choices":[{"text":"50%","value":"A"},{"text":"Less than 10%.","value":"B"},{"text":"More than 95%.","value":"C"},{"text":"Zero.","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":154581,"question":"Which one of the following statements is true about discovery of neutrons?","choices":[{"text":"These particles were formed by the bombardment of Alpha-particles on Beryllium.","value":"A"},{"text":"These particles are formed by the spiting of alpha-particles.","value":"B"},{"text":"These particles were discovered by natural radioactivity.","value":"C"},{"text":"None of above.","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":154573,"question":"With the reference of w/m ratio of anode rays, the e/m ratio of cathode rays s:","choices":[{"text":"Greater.","value":"A"},{"text":"same.","value":"B"},{"text":"Smaller.","value":"C"},{"text":"Not fixed.","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":154566,"question":"Negatively charged particle nature of cathode rays was first demonstrated in 1895 by:","choices":[{"text":"Millikan.","value":"A"},{"text":"J. Perrin.","value":"B"},{"text":"Hittrof","value":"C"},{"text":"J.J. Thomson.","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":154556,"question":"Which one of the following particles has amass 1/1836 time, that of hydrogen?","choices":[{"text":"Neutron.","value":"A"},{"text":"Proton.","value":"B"},{"text":"Electron.","value":"C"},{"text":"Positron.","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":154553,"question":"Proton was discovered by:","choices":[{"text":"Chadwick","value":"A"},{"text":"J.J. Rhomson","value":"B"},{"text":"Millikan.","value":"C"},{"text":"Goldstein.","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":154551,"question":"Charge on electron was discovered by:","choices":[{"text":"Millikan.","value":"A"},{"text":"Crook.","value":"B"},{"text":"Neil Bohr.","value":"C"},{"text":"Rutherford.","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":154549,"question":"The charge over mass ratio of electron 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;\">1.6 x 10<sup>-1</sup></span>\r\nC Kg<sup>-1</sup><o:p></o:p></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;\">9.1 x 10<sup>-31</sup></span>\r\nC Kg<sup>-1</sup><o:p></o:p></p>","value":"B"},{"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;\">1.7588 x 10<sup>11</sup></span>\r\nC Kg<sup>-1</sup><o:p></o:p></p>","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;\">6.62 x 10<sup>-34</sup></span>\r\nC Kg<sup>-1</sup><o:p></o:p></p>","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":154543,"question":"<p class=\"MsoNormal\">Mass of simple electron is:<o:p></o:p></p>","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;\">9.1 x 10<sup>-31</sup></span>\r\nkg<o:p></o:p></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;\">9.1 x 10<sup>-30</sup></span>\r\nkg<o:p></o:p></p>","value":"B"},{"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;\">1.66 x 10<sup>-31</sup></span>\r\nkg<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;\"><o:p></o:p></span></p>","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;\">9.1 x 10<sup>-31</sup></span>\r\nkg<o:p></o:p></p>","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":154541,"question":"Charge of an electron 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;\">1.6 x 10<sup>-19</sup></span>\r\nC<o:p></o:p></p>","value":"A"},{"text":"<p class=\"MsoNormal\">9.1 x <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;\">10<sup>-34</sup></span>\r\nC<o:p></o:p></p>","value":"B"},{"text":"<p class=\"MsoNormal\">1.7588 x <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;\">10<sup>11</sup></span>\r\nC<o:p></o:p></p>","value":"C"},{"text":"<p class=\"MsoNormal\">6.62 x <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;\">10<sup>-34</sup></span>\r\nC<o:p></o:p></p>","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":154533,"question":"When an electric current is passed through discharge tube at low pressure, cathode rays are emitted from cathode these rays consist of:","choices":[{"text":"Alpha rays.","value":"A"},{"text":"Negative particles.","value":"B"},{"text":"Electromagnetic rays.","value":"C"},{"text":"Positive particles.","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":154529,"question":"Charge to mass ratio of electron was discovered by:","choices":[{"text":"Millika.","value":"A"},{"text":"Rutherford.","value":"B"},{"text":"J.J. Thomson.","value":"C"},{"text":"Chadwick.","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":154525,"question":"Alpha rays consist of:","choices":[{"text":"Neutrons.","value":"A"},{"text":"Helium nucleus.","value":"B"},{"text":"Protons.","value":"C"},{"text":"Hydrogen nucleus.","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":154522,"question":"Maximum potential energy that an electron can have within the atom is:","choices":[{"text":"Equal to zero.","value":"A"},{"text":"Less than zero.","value":"B"},{"text":"Greater than zero.","value":"C"},{"text":"Infinite","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":154517,"question":"Which of the following particles has longest wavelength, if they have same speed:","choices":[{"text":"Proton.","value":"A"},{"text":"Neutron.","value":"B"},{"text":"Electron.","value":"C"},{"text":"Positron.","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":154511,"question":"Which of the following was discovered first:","choices":[{"text":"Charge to mass ratio of electrons.","value":"A"},{"text":"Mass of electrons.","value":"B"},{"text":"Charge of electrons.","value":"C"},{"text":"All of above at same time.","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":154506,"question":"The nature of positive rays depend on:","choices":[{"text":"Nature of discharge tube.","value":"A"},{"text":"Nature of resident gas.","value":"B"},{"text":"Nature of electrode.","value":"C"},{"text":"All of above.","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":154501,"question":"The e.m value for positive rays maximum for:","choices":[{"text":"Oxygen.","value":"A"},{"text":"Nitrogen.","value":"B"},{"text":"Helium.","value":"C"},{"text":"Hydrogen.","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":154497,"question":"Neutron was discovered by:","choices":[{"text":"Chadwick.","value":"A"},{"text":"Bohr.","value":"B"},{"text":"Rutherford.","value":"C"},{"text":"Plank.","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":154495,"question":"When 6d orbital is complete, the entering electron goes into:","choices":[{"text":"7f.","value":"A"},{"text":"7s.","value":"B"},{"text":"7p.","value":"C"},{"text":"7d.","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":154492,"question":"Orbital having same energy is called:","choices":[{"text":"Hybrid orbital.","value":"A"},{"text":"Valence orbital.","value":"B"},{"text":"Degenerate orbital.","value":"C"},{"text":"D-orbital.","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":154490,"question":"Quantum number value for 2p orbitals are:","choices":[{"text":"n=2 ,l=1","value":"A"},{"text":"n=1 ,l=2","value":"B"},{"text":"n= ,l=0","value":"C"},{"text":"n=2 ,l=0","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":154485,"question":"In the ground state of an atom, the electron is present:","choices":[{"text":"In the nucleus.","value":"A"},{"text":"In the second shell.","value":"B"},{"text":"Nearest to the nucleus.","value":"C"},{"text":"farthest from the nucleus.","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":154482,"question":"Splitting of spectral lines when atoms are subjected to strong electric field is called:","choices":[{"text":"Zeeman effect.","value":"A"},{"text":"Stark effect","value":"B"},{"text":"Photoelectric effect.","value":"C"},{"text":"Compton effect.","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":154480,"question":"Bohr model of atom is contradicted by:","choices":[{"text":"Planck's quantum theory","value":"A"},{"text":"Pauli's exclusion theory","value":"B"},{"text":"Heisenberg's uncertainty principle.","value":"C"},{"text":"All of above.","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":154477,"question":"Rutherford's model of atom failed because:","choices":[{"text":"The atom did o have a nucleus and electrons","value":"A"},{"text":"It did not account fro the attraction b/w protons and neutrons","value":"B"},{"text":"It did no account for the stability of the atom.","value":"C"},{"text":"There is actually no space b/w the nucleus ad the electrons.","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":154470,"question":"The wave number of light emitted by a certain source is 2 x 10<sup>5</sup>m. The wavelength of this light will be:","choices":[{"text":"500 NM.","value":"A"},{"text":"500 M.","value":"B"},{"text":"200 NM.","value":"C"},{"text":"5 x 10<sup>7</sup>m","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":154464,"question":"The velocity of photon is:","choices":[{"text":"Independent of its wavelength.","value":"A"},{"text":"Depends on its wavelength.","value":"B"},{"text":"Equal to square of its amplitude","value":"C"},{"text":"Depends on its source.","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":154461,"question":"The nature of positive ray depend on:","choices":[{"text":"The nature of electrode.","value":"A"},{"text":"The nature of discharge tube.","value":"B"},{"text":"The nature of residual gas.","value":"C"},{"text":"All of above.","value":"D"},{"value":"E"}],"correctAnswer":3}]