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Which one of the following postulates of...

Which one of the following postulates of Werner's theory is incorrect ?

A

Primary valence are nondirectional while secondery valences are directional

B

Primary valences can be satisfied by neutral as well as negative ions only

C

Primary valence is linked to what we now call the oxidation number of the central metal

D

Secondery valence corresponds to whalt we now call the coordination number of the central metal

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The correct Answer is:
B
Werner postulated that most elements exihibit two types of valences: primary valence and secondary valence. The primary (or ionisable) links are satisfied by negaative ions while the secondry (or noninizable) links can be satisfied by neural or negative ions.
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