K2 (Cu(CN)4) which one is correct___________________?
Correct answer: D. Central atom is present in avionic sphere
- A. Potassium tetra cyano cupperate
- B. Co-ordination number is 2
- C. Ligand is positively charged
- D. Central atom is present in avionic sphere
Explanation
Interpreting the formula as K2[Cu(CN)4], the bracketed complex has a 2− charge and is therefore an anionic coordination sphere containing Cu and four cyanide ligands. The likely alternative is option a, but its name is incomplete because it omits copper's oxidation state, while option d correctly identifies the central atom as being in the anionic sphere.
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About Electronic Structure of d-Block Elements
The electronic structure of d-block elements covers the filling of the (n-1)d and ns orbitals, general electronic configurations, and the exceptions shown by chromium and copper. It explains how partially filled d orbitals produce variable oxidation states, coloured ions, magnetic behaviour and complex formation, while distinguishing transition elements from elements with completely filled d subshells.
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