JEE Main 202529 JanuaryEvening Shift
- Exam
- JEE Main
- Year
- 2025
- Date
- 29 January
- Shift
- Evening Shift
- Subject
- Chemistry
- Chapter
- Coordination Compounds
JEE Main 2025 · 29 January · Evening Shift · Chemistry · Coordination Compounds
Consider the following low-spin complexes K_3[Co(NO_2)_6],...
Consider the following low-spin complexes
,
The sum of the spin-only magnetic moment values of complexes having yellow colour is. _____ B.M. (answer in nearest integer)
Correct answer
0
Step-by-step solution
\left[\mathrm{Co}\left(\mathrm{NO}_2\right)_6\right]= Yellow \Rightarrow \mathrm{Co}^{3+}=3 \mathrm{ d}^6 \Rightarrow \mathrm{t}_{2 \mathrm{ g}^6 \mathrm{e}_{\mathrm{g}^0\begin{aligned}
& \mathrm{K}_4\left[\mathrm{Fe}(\mathrm{CN})_8\right]=\text{ Yellow } \Rightarrow \mathrm{Fe}^{2+}=3 \mathrm{ d}^6 \Rightarrow \mathrm{t}_{2 \mathrm{ g}^6 \mathrm{e}_{\mathrm{g}^0 \\
& \mathrm{ K}_3\left[\mathrm{Fe}(\mathrm{CN})_8\right]=\text{ Bright Red } \Rightarrow \mathrm{Fe}^{3+}=3 \mathrm{ d}^5 \Rightarrow \mathrm{t}_{2 \mathrm{ g}^5 \mathrm{e}_{\mathrm{g}^0 \\
& \mathrm{Cu}_2\left[\mathrm{Fe}(\mathrm{CN})_8\right]=\text{ Chocolate brown } \\
& \mathrm{Zn}_2\left[\mathrm{Fe}(\mathrm{CN})_8\right]=\text{ White }
\end{aligned}$$
Spin only magnetic moment of complex having Yellow colour is zero.