Question

The magnetic moment of $[Co{(N{H}_3)}_6]C{l}_3$ is

• A. 1.73
• B. 2.83
• C. 6.6
• D. zero

Answer 1

Answer: (D)

In ${[Co{(N{H}_3)}_6]}^{3+}$ the oxidation state of $Co$ is +3.
${[Co{(N{H}_3)}_6]}^{3+}$ does not contain unpaired electron hence, its magnetic moment is zero.