[{"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},{"id":154416,"question":"The boiling point of NH<sub>3 is maximum among the hydrides of group V elementsdue to:</sub>","choices":[{"text":"Enhanced electronegative character of Nitrogen","value":"A"},{"text":"Pyramidal structure of NH3","value":"B"},{"text":"Very small size of Nitrogen.","value":"C"},{"text":"Enhanced electropositive character of Nitrogen","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":154412,"question":"Which of the following liquids has low vapour pressure at 25<span style=\"color: rgb(34, 34, 34); font-family: Arial, sans-serif;\">°C:</span><p class=\"MsoNormal\"><o:p></o:p></p>","choices":[{"text":"Diethyl ether","value":"A"},{"text":"Acetone.","value":"B"},{"text":"Water.","value":"C"},{"text":"Ethyl alcohol.","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":154411,"question":"Which of the following liquids has low vapor pressure at 25<span style=\"color: rgb(34, 34, 34); font-family: Arial, sans-serif;\">°C:</span><p class=\"MsoNormal\"><o:p></o:p></p>","choices":[{"text":"Diethyl ether","value":"A"},{"text":"Acetone.","value":"B"},{"text":"Water.","value":"C"},{"text":"Ethyl alcohol.","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":154409,"question":"Escape of high energy molecules from the surface of liquid is called:","choices":[{"text":"Sublimation.","value":"A"},{"text":"Distillation.","value":"B"},{"text":"Condensation.","value":"C"},{"text":"Evaporation.","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":154406,"question":"A liquid on evaporation causes:","choices":[{"text":"Heating effect.","value":"A"},{"text":"Cooling effect.","value":"B"},{"text":"Suffocation .","value":"C"},{"text":"All of above","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":154405,"question":"At sea level and at 100<font color=\"#222222\" face=\"Arial, sans-serif\">°C the vapor pressure of water in an open system is:</font><p class=\"MsoNormal\"><o:p></o:p></p>","choices":[{"text":"1000 mm Hg","value":"A"},{"text":"760 mm Hg","value":"B"},{"text":"730 mm Hg","value":"C"},{"text":"670 mm Hg","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":154403,"question":"Rate of evaporation and rate of condensation at equilibrium:","choices":[{"text":"Become very low","value":"A"},{"text":"Become very high","value":"B"},{"text":"Become equal","value":"C"},{"text":"Can never be equal.","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":154402,"question":"Evaporation of water is possible at:","choices":[{"text":"Above 100<span style=\"font-size: 11pt; line-height: 107%; font-family: Arial, sans-serif; color: rgb(34, 34, 34); background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;\">°C</span>","value":"A"},{"text":"0<span style=\"font-size: 11pt; line-height: 107%; font-family: Arial, sans-serif; color: rgb(34, 34, 34); background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;\">°C</span>","value":"B"},{"text":"100<span style=\"font-size: 11pt; line-height: 107%; font-family: Arial, sans-serif; color: rgb(34, 34, 34); background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;\">°C</span>","value":"C"},{"text":"At all temperature","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":154399,"question":"H<sub>2</sub>S is a gas while H<sub>2</sub>O is a liquid at room temperature. It is due to:","choices":[{"text":"Less inter-molecular forces in water.","value":"A"},{"text":"Covalent bonding H-O in water molecule.","value":"B"},{"text":"Hydrogen bonding in water molecules","value":"C"},{"text":"Ionic character in water molecules","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":154394,"question":"Hydrogen bonding is present in one of the following pairs:","choices":[{"text":"NH<sub>3</sub>","value":"A"},{"text":"H<sub>2</sub>O","value":"B"},{"text":"HF","value":"C"},{"text":"All of above","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":154391,"question":"Debye forces are present in on of the following pairs:","choices":[{"text":"Na+ion and water","value":"A"},{"text":"Argon and water","value":"B"},{"text":"Argon and Na+ion","value":"C"},{"text":"Ne and water","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":154389,"question":"The strongest forces are:","choices":[{"text":"Debye froces","value":"A"},{"text":"London dispersion","value":"B"},{"text":"Dipole-dipole attraction","value":"C"},{"text":"Hydrogen bonding","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":154387,"question":"Polypeptide chains are coiled about one another into a spiral by:","choices":[{"text":"Ionic bonds","value":"A"},{"text":"Covalent bonds","value":"B"},{"text":"Van der Waal's forces","value":"C"},{"text":"Hydrogen bonds","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":154385,"question":"HF has exceptionally low acidic strength due to:","choices":[{"text":"Smaller size of fluorine.","value":"A"},{"text":"Stronger polar bond between H and F.","value":"B"},{"text":"Electronegativity of fluorine","value":"C"},{"text":"Strong hydrogen bonding","value":"D"},{"value":"E"}],"correctAnswer":4}]