What is/ are the coordination number(s) of $A u$ in the complexes formed by $A u$ ?

6

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4

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5

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2

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Solution

The correct options are
B $4$
C $2$
The most common oxidation states for gold in its compounds are +1 and +3.
It forms compounds with coordination numbers 2 and 4.
Most common geometries are linear and planar.

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Similar questions

Q. In the process of extraction of gold,

roasted gold ore + C N^{-} + H_{2} O O_{2} - \to [X] + O H^{-}

[X] + Z n \to [Y] + A u

Identify the complexes

[X]

and

[Y]

$[A u (C N)_{2}]^{⊖}$ is a very stable complex under certain conditions. The concentration of cyande ion which is required to keep 99 mol $%$ of the gold in the form of the cyanide complex is: [Given $K_{f} [A u (C N)_{2}]^{⊖} = 4 \times 10^{28}$ ]