Question

Out of the following statements with respect to the postulates of Werner?? theory, (1) the central metal atom of coordination compounds shows two types of valencies (2) the primary valencies are normally non ionisable and are satisfied by neutral molecules or negative ions (3) the secondary valencies are ionisable and are satisfied by negative ions only (4) the ions/groups bound by the secondary linkages to the metal have characteristic spatial arrangements corresponding to different coordination numbers The incorrect statements are

• A. $(1)$ and $(2)$
• B. $(3)$ and $(4)$
• C. $(2)$ and $(4)$
• D. $(2)$ and $(3)$

Answer 1

Answer: (D)

$(2)$ and $(3)$

Answer 2

Primary valencies are satisfied by negative ions whereas secondary valencies are satisfied by ligands (neutral molecules or negative ions)