A metal gets coated with a green basic carbonate when exposed at atmosphere. Metal is
A transition element X has a configuration [Ar]3d4 in its + 3 oxidation state. Its atomic number is
the outer electron configuration of Gd (At. No. 64) is
The general electronic configuration of transition elements is
Which of the following has the maximum number of unpaired d-electrons
The lanthanide conctraction is responsible for the fact that
The aqueous solution containing which one of the following ions will be colourless
Which of the following ionic species will impart colour to an aqueous solution
A red solid is insoluble in water. However it becomes soluble if
Which one of the following characteristic of the transition metals is associated with their catalytic activity
The correct order of ionic radii of Y3- , La3+ ,Eu3+ and Lu3+ is
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 of the following in Rinmanns green?
Hair dyes contain
Least paramagnetic property is shown by
Green vitriol is
In chromite ore, the oxidation number of iron and chromium are respectively
Which of the following has the maximum number of unpaired d-electrons?
The element which forms ions in dimeric state is
The colour of transition metal compound is due to
Which one of these is not known?
Which one of the following transition element has the lowest value of enthalpy of atomisation?
Which belongs to the actinides series ?
Paramagnetism is exhibited due to which one of the following reason?
Why d-block element form complexes?
Silver, gold, platinum, iron, copper and titanium are part of the
which of the following is amphoteric oxide?
Brass is an alloy of Cu with
Anhydrous ferric chloride is prepared by
The catalytic activity of the transition metals and their compounds is described to
Silver iodide is used for producing artificial rain because AgI
German silver alloy contains
The colour of light absorbed by an aqueous solution of CuSO4 is
Metal ion responsible for the Minamata disease is
the colour of KMno4 is due to
The colour of Cu 2+/2 containing salt is
the lanthanoid Contraction is responsible for the fact that
identify the incorrect statement among the following
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