question_answer

In the complex ion \[{{[Co{{(N{{H}_{3}})}_{6}}]}^{3+}},\] the\[N{{H}_{3}}\] molecules are linked to the central metal ion by

A)  Coordinate bonds

B)  Hydrogen bonds

C)  Covalent bonds

D)  Ionic bonds

Correct Answer: A

Solution :

The central metal ion in the complex makes available a number of empty orbitals for the formation of coordination bonds with suitable ligands. Hence, the correct option is (a).