Import Question JSON

Current Question (ID: 7565)

Question:

$\text{The number of d-electrons in } \text{Fe}^{2+} \text{ (atomic number Z = 26) is different from the number of:}$

Options:

1. $\text{s-electrons in Mg (Z = 12)}$
2. $\text{p-electrons in Cl (Z = 17)}$
3. $\text{d-electrons in Fe (Z = 26)}$
4. $\text{p-electrons in Ne (Z = 10)}$

Solution:

$\text{Hint: The number of d-electrons in } \text{Fe}^{2+} \text{ is 6}$\n\n$\text{Electronic configuration of } \text{Fe}^{2+} = [\text{Ar}]3\text{d}^6 4\text{s}^0$\n$\therefore \text{ Number of d electrons = 6}$\n\n$\text{Mg - } 1\text{s}^2 2\text{s}^2 2\text{p}^6 3\text{s}^2 \text{ (6 s electrons)}$\n$\text{Cl - } 1\text{s}^2 2\text{s}^2 2\text{p}^6 3\text{s}^2 3\text{p}^5 \text{ (11 p electrons)}$\n$\text{Fe-[Ar]} 3\text{d}^6 4\text{s}^2 \text{ (6 d electrons)}$\n$\text{Ne -} 1\text{s}^2 2\text{s}^2 2\text{p}^6 \text{ (6 p electrons)}$\n\n$\text{As Cl has 11 electrons in p subshell,}$

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
}