Which one of the following ions has the same number of unpaired electrons as present in V + ? a) Ti + b) Fe + c) Ni + d) Cr + . The magnetic moment of Mn + ion is a) .92BM b) .80BM c) .95BM d) .90BM . The catalytic behaviour of transition metals and their compounds is ascribed mainly due to a) their magnetic behaviour b) their unfilled d orbitals c) their ability to adopt variable oxidation states d) their chemical reactivity .
The correct order of increasing oxidizing power in the series a) VO Cr O < MnO < b) Cr O < VO MnO < c) Cr O MnO < VO < d) MnO < Cr O VO − < . In acid medium, potassium permanganate oxidizes oxalic acid to a) oxalate b) Carbon dioxide c) acetate d) acetic acid . Which of the following statements is not true? a) on passing H S, through acidified K Cr O solution, a milky colour is observed.
b) Na Cr O is preferred over K Cr O in volumetric analysis c) K Cr O solution in acidic medium is orange in colour d) K Cr O solution becomes yellow on increasing the P H beyond . Permanganate ion changes to in acidic medium a) MnO − b) Mn + c) Mn + d) MnO XII U4-D-Block-Jerald XII U4-D-Block-Jerald - - - - . How many moles of I2 are liberated when mole of potassium dichromate react with potassium iodide? a) b) c) d) .
The number of moles of acidified KMnO required to oxidize mole of ferrous oxalate(FeC O ) is a) b) c) . d) . . Which one of the following statements related to lanthanons is incorrect?
a) Europium shows + oxidation state. b) The basicity decreases as the ionic radius decreases from Pr to