Question

Write any two postulates of Werner's theory of coordination compounds.

Answer 1

Postulates of werner's theory of Co-ordination compounds:
(1) Most of the metallic elements exhibits two types of valence: (i) Primary valence or principal valence and (ii) secondary valence
(2) Every metal tends to satisfy both of its primary and secondary valences.
(3) Every metal has a fixed number of secondary valence
(4) The secondary valence is always directed towards fixed positions in space.