[{"id":110510,"question":"The uncertainty principle was stated only","choices":[{"text":"De Brogilie","value":"A"},{"text":"Heinsenberg","value":"B"},{"text":"Einstein","value":"C"},{"text":"Schrodinger","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":110508,"question":"","questionImage":"110508_636316532274572641-RQ.jpg","choices":[{"text":"Plank's equations","value":"A"},{"text":"de Broglie's equations","value":"B"},{"text":"Heisenburg's equation","value":"C"},{"text":"None","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":110505,"question":"The divisibility of atom was shown by","choices":[{"text":"Stoney","value":"A"},{"text":"J.J. Thomson","value":"B"},{"text":"Millikan","value":"C"},{"text":"Rutherford","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":110504,"question":"The wave number of the line emitted is 109.678 x 10<sup>5</sup>m<sup>-1</sup>in the Lyman series when electron transition occurs","choices":[{"text":"","img":"110504_636316530601512453-RA1.jpg","value":"A"},{"text":"","img":"110504_636316530601512453-RA2.jpg","value":"B"},{"text":"","img":"110504_636316530601512453-RA3.jpg","value":"C"},{"text":"","img":"110504_636316530601512453-RA4.jpg","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":110500,"question":"Light emitted from a source has its wave length 500nm, then its wave number will be","choices":[{"text":"2 x 10<sup>6</sup>m<sup>-1</sup>","value":"A"},{"text":"2 x 10<sup>7</sup>m<sup>-1</sup>","value":"B"},{"text":"5 x 10<sup>8 </sup>m<sup>-1</sup>","value":"C"},{"text":"5 x 10<sup>9</sup>m<sup>-1</sup>","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":110497,"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":110496,"question":"Splitting of spectral lines of the hydrogen atom under the influence or magnetic field is called","choices":[{"text":"Stark effect","value":"A"},{"text":"Zeeman effect","value":"B"},{"text":"Compton effect","value":"C"},{"text":"Photoelectric effect","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":110493,"question":"The limiting line of Blamer series in hydrogen spectrum lies in","choices":[{"text":"Visible regions","value":"A"},{"text":"Ultraviolet region","value":"B"},{"text":"Infrared region","value":"C"},{"text":"x-rays region","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":110491,"question":"When electron jumps from n<sub>2</sub>= 2,3,4,5,.... orbit to n<sub>1</sub>= 1 orbit in the hydrogen atom, the radiations emitted give the spectral lines","choices":[{"text":"Lyman series","value":"A"},{"text":"Blamer series","value":"B"},{"text":"Paschen series","value":"C"},{"text":"Brackett series","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":110488,"question":"In the atomic emission spectrum the lines which appear bright, appear dark in absorption spectrum because","choices":[{"text":"The radiations emitted in emission spectrum are absorbed in absorption spectrum","value":"A"},{"text":"Atomic emission spectrum is continuous","value":"B"},{"text":"Atomic absorption spectrum is continuous","value":"C"},{"text":"Distance between the lines increases","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":110485,"question":"Energy of electron in an orbit according to Bohr theory is negative due to","choices":[{"text":"Repulsion of electrons in the same orb","value":"A"},{"text":"At infinity energy is zero ad a traction towards nucleus decreases energy","value":"B"},{"text":"Electron has negative charge","value":"C"},{"text":"Product of positive nuclear charge and negative charge is negative","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":110482,"question":"In Bohr model of hydrogen atom the distance between adjacent orbits increases away from the nucleus, the energy difference between the orbits","choices":[{"text":"Increases","value":"A"},{"text":"Decreases","value":"B"},{"text":"Reaming same","value":"C"},{"text":"Orbits coincide","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":110480,"question":"Energy of electron in the infinite Bohr orbit of H-atom is","choices":[{"text":"0 KJ/mole","value":"A"},{"text":"1 KJ/mole","value":"B"},{"text":"-1 KJ/mole","value":"C"},{"text":"-1313.32 KJ/mole","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":110479,"question":"Energy of electron in first orbit of H atom is","choices":[{"text":"-45.32 KJ/mole","value":"A"},{"text":"-82.08 KJ/mole","value":"B"},{"text":"-52.53 KJ/mole","value":"C"},{"text":"-1313.31 KJ/mole","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":110478,"question":"The radius of first orbit of H-atom is","choices":[{"text":"4.75 A°","value":"A"},{"text":"3.84 A°","value":"B"},{"text":"8.4 A°","value":"C"},{"text":"0.529 A°","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":110477,"question":"The order of distance between the various Bohr orbits is","choices":[{"text":"r<sub>2</sub>- r<sub>1</sub>&gt; r<sub>3</sub>- r<sub>2</sub>&gt; r<sub>4</sub>- r<sub>3</sub>&gt; ......","value":"A"},{"text":"r<sub>1</sub>&gt; r<sub>2</sub>&gt; r<sub>2</sub>- r<sub>3</sub>&gt; r<sub>4</sub>-r<sub>3</sub>&gt; .....","value":"B"},{"text":"r<sub>2</sub>-r<sub>1</sub>= r<sub>3</sub>- r<sub>2</sub>= r<sub>4</sub>- r<sub>3</sub>&gt; .....","value":"C"},{"text":"r<sub>2</sub>- r<sub>1</sub>&gt; r<sub>3</sub>- r<sub>2</sub>&lt; r<sub>4</sub>- r<sub>3</sub>&lt; ....","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":110475,"question":"Rutherford's planetary like picture of the atomic modal was defective because","choices":[{"text":"It did not describe the quantity of positive charge","value":"A"},{"text":"It did not explain the repulsion of protons within the nucleus","value":"B"},{"text":"No empty space between nucleus and the electrons","value":"C"},{"text":"Moving electron should radiate energy","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":110473,"question":"Smallest charge of electricity that has been measured so far is","choices":[{"text":"Charge on a-rays","value":"A"},{"text":"Charge on electron (1.602 x 10<sup>-19</sup>C)","value":"B"},{"text":"Charge on x-rays","value":"C"},{"text":"Charge on gamma rays","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":110472,"question":"In Millikan method the oil droplet falls under the force of gravity but it moves upward due to","choices":[{"text":"Electric field","value":"A"},{"text":"Magnetic field","value":"B"},{"text":"Incident light","value":"C"},{"text":"X-rays","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":110470,"question":"In Millikan method for determination of charge on electron the air in the chamber is ionized by","choices":[{"text":"Protons","value":"A"},{"text":"Electric field","value":"B"},{"text":"X-rays","value":"C"},{"text":"a - particles","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":110468,"question":"","questionImage":"110468_636316512230318600-RQ.jpg","choices":[{"text":"Neutrons are attracted by nucleus","value":"A"},{"text":"Neutrons carry out nuclear reactions","value":"B"},{"text":"Neutrons carry no charge","value":"C"},{"text":"Neutrons are electromagnetic radiations","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":110465,"question":"When the 6d orbital is completed the entering electron goes into","choices":[{"text":"7f","value":"A"},{"text":"7 s","value":"B"},{"text":"7 p","value":"C"},{"text":"7 d","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":110464,"question":"Positive particle in discharged tube is produced by ionization of gas molecules, which is caused by","choices":[{"text":"Gas molecules collide with anode","value":"A"},{"text":"Gas molecules are at high temperature","value":"B"},{"text":"Gas molecules produce X-rays","value":"C"},{"text":"Cathode rays remove electrons from gas molecules","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":110460,"question":"When cathode rays strike the anode metal X-rays are emitted and not the positive rays because","choices":[{"text":"Cathode rays are material particles","value":"A"},{"text":"Cathode rays knock out electrons from anode, which emit X-rays when outer electron take their place","value":"B"},{"text":"Cathode rays are absorbed by the nucleus","value":"C"},{"text":"Cathode rays become heated","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":110457,"question":"e/m of cathode rays is same but for positive rays e/m changes by changing gas in the discharge tube because","choices":[{"text":"Cathode rays are small sized particles","value":"A"},{"text":"Cathode rays have same charge","value":"B"},{"text":"Nature of cathode rays same for all gasses, but masses of nuclei are different for different gases","value":"C"},{"text":"Temperature of cathode rays higher","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":110455,"question":"No cathode rays are produced in the discharged tube when gas is under ordinary pressure even if voltage of 5000 to 10000 is applies. This reason is","choices":[{"text":"Voltage is low","value":"A"},{"text":"Discharge tube is not coloured","value":"B"},{"text":"Gas does not conduct current under ordinary pressure","value":"C"},{"text":"Temperature low","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":110453,"question":"Cathode rays drive a small paddle wheel placed in their path. This observation shows that","choices":[{"text":"Cathode rays travel in straight lines","value":"A"},{"text":"Cathode rays are negatively charged","value":"B"},{"text":"Cathode rays produce x-rays","value":"C"},{"text":"Cathode rays are material particles having momentum","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":110451,"question":"The value of charge on electron is","choices":[{"text":"1.602 x 10<sup>-19</sup>coulombs","value":"A"},{"text":"1.602 x 10<sup>-18</sup>coulombs","value":"B"},{"text":"1.602 x 10<sup>-17</sup>coulombs","value":"C"},{"text":"1.602 x 10<sup>-16 </sup>coulombs","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":110446,"question":"","questionImage":"110446_636316502430744990-RQ.jpg","choices":[{"text":"s","value":"A"},{"text":"p","value":"B"},{"text":"d","value":"C"},{"text":"f","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":110445,"question":"The rules which describe the distribution of electron in atomic energy levels are Auf-ban principle, Pauli's exclusion principle. Hunds rule. The pauli exclusion principle refers to the","choices":[{"text":"Orientation of orbital in space","value":"A"},{"text":"Fact that two electrons in the same orbital should have opposite spins","value":"B"},{"text":"Energy of the orbital","value":"C"},{"text":"Spin of the electron","value":"D"},{"value":"E"}],"correctAnswer":2}]