Import Question JSON

Current Question (ID: 18749)

Question:

$\text{The complex among the following with the highest value of crystal field splitting energy is:}$

Options:

1. $[\text{Fe} (\text{H}_2\text{O})_6]^{+3}$
2. $[\text{Ru} (\text{CN})_6]^{3-}$
3. $[\text{Fe} (\text{H}_2\text{O})_6]^{+2}$
4. $[\text{Fe} (\text{NH}_3)_6]^{3+}$

Solution:

$\text{STEP 1: The crystal field splitting energy depends on strength of the ligand and the oxidation state of the metal ion.}$ $\text{As the positive oxidation state on metal ion increases the interaction with ligand also increases, thus, crystal field splitting also increases.}$ $\text{The correct order of strength of the ligand is as follows:}$ $\text{- CN} > \text{NH}_3 > \text{H}_2\text{O}$ $\text{STEP 2: In the second complex, that is, } [\text{Ru} (\text{CN})_6]^{3-} \text{ the oxidation state of Ru is +3 and the ligand is cyanide ligand.}$ $\text{Thus, the interaction between } \text{Ru}^{3+} \text{ and cyanide ion is strong. Hence, option second is correct.}$

Import JSON File

Upload a JSON file containing LaTeX/MathJax formatted question, options, and solution.

Expected JSON Format:

{
  "question": "The mass of carbon present in 0.5 mole of $\\mathrm{K}_4[\\mathrm{Fe(CN)}_6]$ is:",
  "options": [
    {
      "id": 1,
      "text": "1.8 g"
    },
    {
      "id": 2,
      "text": "18 g"
    },
    {
      "id": 3,
      "text": "3.6 g"
    },
    {
      "id": 4,
      "text": "36 g"
    }
  ],
  "solution": "\\begin{align}\n&\\text{Hint: Mole concept}\\\\\n&1 \\text{ mole of } \\mathrm{K}_4[\\mathrm{Fe(CN)}_6] = 6 \\text{ moles of carbon atom}\\\\\n&0.5 \\text{ mole of } \\mathrm{K}_4[\\mathrm{Fe(CN)}_6] = 6 \\times 0.5 \\text{ mol} = 3 \\text{ mol}\\\\\n&1 \\text{ mol of carbon} = 12 \\text{ g}\\\\\n&3 \\text{ mol carbon} = 12 \\times 3 = 36 \\text{ g}\\\\\n&\\text{Hence, 36 g mass of carbon present in 0.5 mole of } \\mathrm{K}_4[\\mathrm{Fe(CN)}_6].\n\\end{align}",
  "correct_answer": 4
}