Which of the following has the maximum number of unpaired d-electrons
The aqueous solution containing which one of the following ions will be colourless
Among the following series of transition metal ions, the one in which all metals ions have 3d2 electronic configuration is
Which of the following ionic species will impart colour to an aqueous solution
The correct order of ionic radii of Y3- , La3+ ,Eu3+ and Lu3+ is
Highest (+7) oxidation state is shown by
Which one of the following characteristic of the transition metals is associated with their catalytic activity
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