Chemistry - Complete d-block Question with Solution | TestHub
The IUPAC definition of a transition element is that it is an element that has an incomplete d-subshell in either the neutral atom or its ion. Thus the group 12 elements are member of the d-block but are not transition elements.
Chemically soft members of the d-block occurs as sulphide minerals and are partially oxidised to obtain the metal, the more electropositive 'hard' metals occurs as oxides and are extracted by reduction.
Opposite to p-block tend to exist in low oxidation states and favoured by the heavier elements of d-block. Metals on the right of the d-block tend to exist in low oxidation states and form complexes with the ligands. Square-planar complexes are common for the platinum metals and gold in oxidation state that yield d8 electronic condiguration, which include Rh (I), Ir(I), Pd(II), Pt(II) and Au(III).
The most distinctive features/properties of transition metal complex is their wide range of colours. The crystal field theory attributes the colour of the coordination compounds to d-d transition of the electron. It is important to note that (a) in absence of ligand, crystal field splitting does not occur and hence the substance is colourless ; (b) the type of ligand also influences the colour of the complexes.
Which of the following statements in incorrect?
Options:
Answer:
Solution:
(A)There are three complete rows, 3d, 4d and 5d series and one incomplete 6d series.
(B) is chalcocyte of copper glance and is argentite.
(C) Siderite is i.e. carbonate ore.
. . .
above 1500 K .
(D) As the involvement of greater number of electrons in addition to ns electrons results into strong interatomic metallic bonding.