Q1
The species that donates a lone pair is a:
📝 SolutionA ligand acts as a Lewis base by donating a lone pair; the metal acts as a Lewis acid by accepting it.
Q2
In $K_4[Fe(CN)_6]$, the oxidation state of iron is:
📝 SolutionK is +1 (×4 = +4). Each CN⁻ is −1 (×6 = −6). For the neutral compound, Fe + 4 − 6 = 0, so Fe = +2.
Q3
Ethylenediamine (en) is an example of a:
📝 SolutionEthylenediamine has two nitrogen donor atoms, making it a bidentate ligand.
Q4
A complex ion carries:
📝 SolutionA complex ion has a net charge equal to the sum of the metal's oxidation state and the charges of its ligands.
Q5
The bond between a ligand and the central metal is a:
📝 SolutionLigands form coordinate (dative) bonds with the metal, in which both shared electrons come from the ligand.
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Class 12 · Chemistry
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