Four successive members of the first row transition elements are listed below with their atomic numbers. Which one of them is expe..
Highest (+7) oxidation state is shown by
A transition element X has a configuration [Ar]3d4 in its + 3 oxidation state. Its atomic number is
A metal gets coated with a green basic carbonate when exposed at atmosphere. Metal is
the outer electron configuration of Gd (At. No. 64) is
The lanthanide conctraction is responsible for the fact that
The general electronic configuration of transition elements is
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
The correct order of ionic radii of Y3- , La3+ ,Eu3+ and Lu3+ is
Which of the following ionic species will impart colour to an aqueous solution
The main reason for larger number of oxidation states exhibited by the actinoids than the corresponding Lanthanoids
Among the following series of transition metal ions, the one in which all metals ions have 3d2 electronic configuration is
Which one of the following characteristic of the transition metals is associated with their catalytic activity
A red solid is insoluble in water. However it becomes soluble if
The colour of transition metal compound is due to
Hair dyes contain
Which of the following in Rinmanns green?
Which one of these is not known?
Green vitriol is
The element which forms ions in dimeric state is
In chromite ore, the oxidation number of iron and chromium are respectively
Brass is an alloy of Cu with
Which belongs to the actinides series ?
Silver, gold, platinum, iron, copper and titanium are part of the
The colour of light absorbed by an aqueous solution of CuSO4 is
Anhydrous ferric chloride is prepared by
Metal ion responsible for the Minamata disease is
The catalytic activity of the transition metals and their compounds is described to
Least paramagnetic property is shown by
Paramagnetism is exhibited due to which one of the following reason?
German silver alloy contains
Which of the following has the maximum number of unpaired d-electrons?
Silver iodide is used for producing artificial rain because AgI
Why d-block element form complexes?
Which one of the following transition element has the lowest value of enthalpy of atomisation?
which of the following is amphoteric oxide?
The colour of Cu 2+/2 containing salt is
The spin only magnetic moment of Fe^2+ ion (in BM) is approximately
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