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K2MnO4, MnO2 and MnSO4 is in the order","choices":[{"text":"+7.+6.+2,+4","value":"A"},{"text":"+6,+7,+2,+4","value":"B"},{"text":"+7. +6.+4.+2","value":"C"},{"text":"+4, +6, +7,+2","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":253120,"question":"which of the following d blocks element can showthe highest oxidation number is its ompound","choices":[{"text":"Chromium","value":"A"},{"text":"iron","value":"B"},{"text":"Copper","value":"C"},{"text":"Manganese","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":253118,"question":"In [Ti (H2O)]3+ which colour is transmitted","choices":[{"text":"Yellow","value":"A"},{"text":"Blue and red","value":"B"},{"text":"Blue and yellow","value":"C"},{"text":"red and yellow","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":253117,"question":"In the electronic configuration of Cr one electron from 4s sub-shell is transferred to 3d sub-shell because","choices":[{"text":"The 3d orbital is of lower energy than 4s","value":"A"},{"text":"The half-filled d-subshell is more stable than 4 electrons having d-subshell","value":"B"},{"text":"The 4s orbital is of equal energy to 3d orbital","value":"C"},{"text":"6 unpaired electron make Cr more paramagnetic","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":253115,"question":"Which of the following is a non-typical transition element?","choices":[{"text":"Cr","value":"A"},{"text":"Zn","value":"B"},{"text":"Mn","value":"C"},{"text":"Fe","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":253114,"question":"When light is exposed to a typical transition element, then electrons jumps from low orbitals to higher orbitals in","choices":[{"text":"f-orbitals","value":"A"},{"text":"s-orbitals","value":"B"},{"text":"p-orbitals","value":"C"},{"text":"d-orbitals","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":253111,"question":"Highest oxidation state af the transition elements is","choices":[{"text":"+8","value":"A"},{"text":"+7","value":"B"},{"text":"+5","value":"C"},{"text":"+1","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":253110,"question":"Electrons in 5d energy level are filled up in case of","choices":[{"text":"Lanthanides","value":"A"},{"text":"Transition metals","value":"B"},{"text":"Actinides","value":"C"},{"text":"Rare gases","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":253108,"question":"Zn has","choices":[{"text":"Zero unpaired electrons","value":"A"},{"text":"Three unpaired electrons","value":"B"},{"text":"Five unpaired electrons","value":"C"},{"text":"One paired electrons","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":253107,"question":"The number of unpaired electrons present in Fe ions is","choices":[{"text":"1","value":"A"},{"text":"2","value":"B"},{"text":"5","value":"C"},{"text":"0","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":253105,"question":"Paramagnetic behaviour is caused by the presence of","choices":[{"text":"Unpaired electrons","value":"A"},{"text":"Paired electrons","value":"B"},{"text":"Paired protons","value":"C"},{"text":"Paired electrons in an atom. molecule or ion","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":253104,"question":"A transition element X has a configuration [Ar) 4s3dd in its +3 oxidation state. 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Re","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":253095,"question":"The strength of binding energy of transition elements depends upon","choices":[{"text":"Number of electron pairs","value":"A"},{"text":"Number of unpaired electrons","value":"B"},{"text":"Number of neutrons","value":"C"},{"text":"Number of protons","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":253094,"question":"D-block elements are also called","choices":[{"text":"Non-typical transition element","value":"A"},{"text":"Outer transition elements","value":"B"},{"text":"Abnormal transition elements","value":"C"},{"text":"Inner transition","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":253085,"question":"Fluorine is largely used in","choices":[{"text":"rocket fuels","value":"A"},{"text":"making Teflon","value":"B"},{"text":"making freon","value":"C"},{"text":"All","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":253084,"question":"Which noble gas is used in mixture used for breathing by divers?","choices":[{"text":"Ge","value":"A"},{"text":"Ar","value":"B"},{"text":"Kr","value":"C"},{"text":"He","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":253083,"question":"Which compound gives carbon when heated with conc. H2SO4.","choices":[{"text":"Starch","value":"A"},{"text":"Ethyl alcohol","value":"B"},{"text":"Oxalic acid","value":"C"},{"text":"Formic acid","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":253081,"question":"The reaction between Cu and conc. H2SO4 produces","choices":[{"text":"Cu+2","value":"A"},{"text":"SO<sub>2</sub>","value":"B"},{"text":"SO<sub>3</sub>","value":"C"},{"text":"H<sub>2</sub>","value":"D"},{"value":"E"}],"correctAnswer":2}]