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In Werner's theory of coordination compounds, the PRIMARY valency corresponds to:
AThe coordination number of the metal centre
BThe number of ligands bonded to the metal
CThe oxidation state of the central metal ion
DThe geometric shape of the complex
Answer & Solution
Correct answer: C. The oxidation state of the central metal ion
Werner's primary valency = ionisable, satisfied by negative counter-ions; equals OXIDATION STATE of the metal. Secondary valency = coordination number (geometry-determining).
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