[{"id":140067,"question":"Water (H2O) is liquid while hydrogen sulphide (H2S) is a gas because","choices":[{"text":"Water has higher molecular weight","value":"A"},{"text":"Hydrogen sulphide is a weak acid","value":"B"},{"text":"Sulphure has high electronegativity than oxygen","value":"C"},{"text":"Water molecules associate through hydrogen","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":140066,"question":"The valence orbital configuration of an element with atomic number 23 is","choices":[{"text":"3d5","value":"A"},{"text":"3d3, 4s2","value":"B"},{"text":"3d3, 4s1, 4p1","value":"C"},{"text":"3d2, 4s2, 4p1","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":140065,"question":"Which quantum number is sufficient to describe the electron is hydrogen","choices":[{"text":"
ι
","value":"A"},{"text":"n","value":"B"},{"text":"m","value":"C"},{"text":"s","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":140064,"question":"When electrons revolve in stationary orbits,","choices":[{"text":"There is no change in energy level","value":"A"},{"text":"They vecome stationary","value":"B"},{"text":"They are gaining kinetic energy","value":"C"},{"text":"There is increase in energy","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":140063,"question":"The symbol of the element whose atoms have the outer most electronic configuration 2s2sp3is","choices":[{"text":"N","value":"A"},{"text":"Li","value":"B"},{"text":"P","value":"C"},{"text":"Na","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":140062,"question":"The number of electrons in the M shell of the element with atomic number 24 is","choices":[{"text":"24","value":"A"},{"text":"12","value":"B"},{"text":"13","value":"C"},{"text":"8","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":140061,"question":"The maximum number of electrons in a subshell for whichι = 3 is","choices":[{"text":"14","value":"A"},{"text":"10","value":"B"},{"text":"8","value":"C"},{"text":"4","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":140060,"question":"The ratio of the ionization energy of H and Be3+is","choices":[{"text":"1 : 1","value":"A"},{"text":"1 : 3","value":"B"},{"text":"1 : 9","value":"C"},{"text":"1 : 16","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":140059,"question":"The mass of the neutron is of the order of","choices":[{"text":"10-23kg","value":"A"},{"text":"10-24kg","value":"B"},{"text":"10-26kg","value":"C"},{"text":"10-27kg","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":140058,"question":"The credit of discovering neutron goes to","choices":[{"text":"Rutherford","value":"A"},{"text":"Langmuir","value":"B"},{"text":"Chadwick","value":"C"},{"text":"Austen","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":140057,"question":"With increasing principle quantum number, the energy difference between adjacent energy levels in H atom","choices":[{"text":"Decreases","value":"A"},{"text":"Increases","value":"B"},{"text":"Remain constant","value":"C"},{"text":"Decreses for low value of Z and increases for higher value of Z.","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":140056,"question":"The ratio of close packed atoms to tetrahedral holes in cubic close packing is","choices":[{"text":"1 : 1","value":"A"},{"text":"1 : 2","value":"B"},{"text":"1 : 3","value":"C"},{"text":"2 : 1","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":140055,"question":"Potassium crystallizes with a","choices":[{"text":"Orthogonal lattice","value":"A"},{"text":"Cubic lattice","value":"B"},{"text":"Triclinic","value":"C"},{"text":"Ortho rhombic lattice","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":140054,"question":"How many kinds of space lattices are possible in a crystal?","choices":[{"text":"23","value":"A"},{"text":"7","value":"B"},{"text":"230","value":"C"},{"text":"14","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":140053,"question":"In a crystal a≠b≠c, a =γ= 90° andβ≠90°. It is","choices":[{"text":"Monoclinic","value":"A"},{"text":"Rhombic","value":"B"},{"text":"Trigonal","value":"C"},{"text":"Tetragonal","value":"D"},{"value":"E"}],"correctAnswer":1}]