allery**Werner's primary valency** of a metal in a coordination compound is satisfied by:
ANeutral ligands only
BAnions (ionizable, outside the coordination sphere)
CThe metal itself
DCations
Answer & Solution
Correct answer: B. Anions (ionizable, outside the coordination sphere)
Werner postulated that metals have two valencies: **primary** (ionizable) = oxidation state, satisfied by anions outside the sphere.
**secondary** (non-ionizable) = coordination number, satisfied by ligands inside the sphere.
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