Given below are two statements : Statement I : Crystal Field Stabilization Energy (CFSE) of is greater than that of Statement II : Potassium ferricyanide has a greater spin-only magnetic moment than sodium ferrocyanide. In the light of the above stat

Question

Given below are two statements :

Statement I : Crystal Field Stabilization Energy (CFSE) of ${[Cr {(H_{2} O)}_{6}]}^{2 +}$ is greater than that of ${[Mn {(H_{2} O)}_{6}]}^{2 +}$

Statement II : Potassium ferricyanide has a greater spin-only magnetic moment than sodium ferrocyanide.

In the light of the above statements, choose the correct answer from the options given below : [2026]

Smart Achievers · Accepted Answer

(4)

${[Mn {(H_{2} O)}_{6}]}^{2 +} \Rightarrow$ CFSE value is zero because of ${[Mn {(H_{2} O)}_{6}]}^{2 +}$ configuration with WFL in coordination number 6 ${[Cr {(H_{2} O)}_{6}]}^{2 +}$ .

${[Cr {(H_{2} O)}_{6}]}^{2 +} \Rightarrow$ CFSE value is $- 0.6 Δ_{o}$ because of $d^{4}$ configuration with WFL in coordination number 6.

$For : K_{3} [Fe {(CN)}_{6}], μ = \sqrt{1 (1 + 2)} = \sqrt{3} B.M.$

$For : N a_{4} [Fe {(CN)}_{6}], μ = \sqrt{0} B.M.$

Solution

1 Statement I is false but Statement II is true

2 Both Statement I and Statement II are false

3 Statement I is true but Statement II is false

4 Both Statement I and Statement II are true

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