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(Crystal Field Theory) Consider the violet-colored compound, $[Cr(OH_2)_6]Cl_3$ and the yellow compound, $[Cr(NH_3)_6]Cl_3$. Which of the following statements is false?

 

$\begin{array}{1 1}(a)\;\text{Both chromium metal ions are paramagnetic with 3 unpaired electrons}\\(b)\; \Delta_{oct}\; for\; [Cr(NH_3)_6]^{3+}\;\text{is calculated directly from the energy of yellow light}\\(c)\;  \Delta_{oct}\; for\; [Cr(OH_2)_6]^{3+}\;\text{is less than}\; \Delta_{oct}\; for \;[Cr(NH_3)_6]^{3+}\\(d)\;\text{A solution of }[Cr(OH_2)_6]Cl_3\text{ transmits light with an approximate wavelength range of 4000 - 4200 angstroms}\end{array}$

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$\Delta_{oct}\; for\; [Cr(NH_3)_6]^{3+}\;\text{is calculated directly from the energy of yellow light}$ is a false statement.
Hence (b) is the correct answer.
answered Feb 3, 2014 by sreemathi.v
 

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