[{"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},{"id":154383,"question":"Hydrocarbon molecule with large chain lengths experience:","choices":[{"text":"Weaker attractive forces","value":"A"},{"text":"Stronger attractive forces","value":"B"},{"text":"Repulsive forces","value":"C"},{"text":"No attractive forces","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":154382,"question":"In a group on going downward, polarizability generally:","choices":[{"text":"Decreases","value":"A"},{"text":"Increases","value":"B"},{"text":"Remain constant","value":"C"},{"text":"Negligible","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":154380,"question":"London dispersion forces are also called:","choices":[{"text":"Hydrogen bonding.","value":"A"},{"text":"Debye forces","value":"B"},{"text":"Van der Waal's forces","value":"C"},{"text":"Instantaneous dipole-induced dipole forces.","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":154378,"question":"London dispersion forces are alos called:","choices":[{"text":"Hydrogen bonding.","value":"A"},{"text":"Debye forces","value":"B"},{"text":"Van der Waal's forces","value":"C"},{"text":"Instantaneous dipole-induced dipole forces.","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":154376,"question":"The inter-molecular forces in liquids are:","choices":[{"text":"Negligible","value":"A"},{"text":"Very weak","value":"B"},{"text":"Very strong","value":"C"},{"text":"Reasonably strong","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":154374,"question":"The gases can be converted into liquids by:","choices":[{"text":"Increasing the pressure only.","value":"A"},{"text":"Lowering temperature and increasing pressure","value":"B"},{"text":"Increasing pressure and bringing temperature below critical points","value":"C"},{"text":"Lowering temperature only","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":154372,"question":"Which one of the following is weakest inter molecular force?","choices":[{"text":"Dipole induced dipole forces","value":"A"},{"text":"Ionic dipole forces","value":"B"},{"text":"Electrostatic forces b/w ions","value":"C"},{"text":"Dipole dipole forces","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":154371,"question":"The density of water decreases, When it is freezed at 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;\">°</span>C","choices":[{"text":"Change of bond length","value":"A"},{"text":"Change of bond angles","value":"B"},{"text":"Cubic structure of ice","value":"C"},{"text":"Empty spaces present in the structure of ice","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":154370,"question":"]Which of the following is a pseudo solid?              <p class=\"MsoNormal\"><o:p></o:p></p>","choices":[{"text":"Atoms of He is gaseous stat at high temperate.","value":"A"},{"text":"Molecules of water in liquid state.","value":"B"},{"text":"Molecules of solid l<sub>2</sub>","value":"C"},{"text":"Molecular of hydrochloric acid gas","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":154369,"question":"Force of attraction b/w atoms of He is :","choices":[{"text":"London dispersion forces","value":"A"},{"text":"Hydrogen bonding","value":"B"},{"text":"Coordinate covalent bond","value":"C"},{"text":"Covalent bond","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":154368,"question":"Chloroform and acetone are soluble in each other due to:","choices":[{"text":"Instantaneous dipole interactions.","value":"A"},{"text":"Dipole-dipole interactions.","value":"B"},{"text":"Inter molecular hydrogen bonding.","value":"C"},{"text":"All of above","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":154367,"question":"Diamond is a bad conductor because:","choices":[{"text":"It<i></i>has tight structure","value":"A"},{"text":"It has a high density","value":"B"},{"text":"There is no free electron present in the crystal of diamond of conduct electricity is transparent to light","value":"C"},{"value":"D"},{"value":"E"}],"correctAnswer":2},{"id":154366,"question":"<p class=\"MsoNormal\">Which of the following is a pseudo solid?              <o:p></o:p></p>","choices":[{"text":"<p class=\"MsoNormal\">CaF<sub>2</sub> <o:p></o:p></p>","value":"A"},{"text":"<p class=\"MsoNormal\">Glass<o:p></o:p></p>","value":"B"},{"text":"<p class=\"MsoNormal\">NaCL<o:p></o:p></p>","value":"C"},{"text":"<p class=\"MsoNormal\">All<o:p></o:p></p>","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":154365,"question":"The molecules of CO<sub>2 in dry ice from the :</sub>","choices":[{"text":"Ionic crystals","value":"A"},{"text":"Coverlet crystals","value":"B"},{"text":"Molecular crystals","value":"C"},{"text":"Any type of crystals","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":154364,"question":"Amorphous solids:","choices":[{"text":"Have a sharp melting point","value":"A"},{"text":"Undergo clean cleavage when cut with knife","value":"B"},{"text":"Have a perfect arrangement of atoms","value":"C"},{"text":"Can possesses small regions of orderly arrangement of atoms","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":154363,"question":"Ionic solids are characterized by :","choices":[{"text":"Low meeting points","value":"A"},{"text":"Good conductivity in solid state","value":"B"},{"text":"High vapor pressure","value":"C"},{"text":"Solubility in polar solvents","value":"D"},{"value":"E"}],"correctAnswer":4}]