Question

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

• A. secondary valence is equal to the coordination number and it depends upon the nature of ligand attached to metal.
• B. The ions/groups bound by the secondary linkages to the metal have charecteristic spatial arragements
• C. Primary valencies are satisfied by negative ions
• D. None of the above

Answer 1

The correct option is D None of the above

Postulates of Werner's theory
Metals in coordination compounds show two types of valencies/linkages. primary and secondary.
The primary valencies are​ normally ionisable and are​ satisfied by negative ions.​
The secondary valencies are ​non-ionisable. These are satisfied by neutral molecules​ or negative ions. ​A secondary valency is equal to the coordination number and is fixed for a metal.
The ions/groups bound by the secondary linkages to the metal have characteristic spatial arrangements corresponding to different coordination numbers.