Question

Secondary valencies correspond to ____________ of the metal atom and are satisfied by ligands.

• A. coordination number
• B. valency
• C. element
• D. molecules

Answer 1

Answer: (A)

coordination number

Secondary valency corresponds to the coordination number of central metal atom or ion. This may be satisfied by either negative ions or neutral molecules called ligands.

Ligands satisfying the secondary valencies are always shown in square brackets, i.e. they form the coordination sphere of the metal atom.

Hence,option A is correct.