Import Question JSON

Current Question (ID: 21553)

Question:

$\text{What is the difference in the spin-only magnetic moment (in B.M.)}$ $\text{between manganese (Mn) in } \text{KMnO}_4 \text{ and manganese species in the}$ $\text{product (X) of the given reaction?}$ $\text{KMnO}_4 \xrightarrow{\text{H}^+} \text{X (product having Mn)}$

Options:

1. $2$
2. $4$
3. $0$
4. $6$

Solution:

$\text{Hint: In acidic medium } \text{KMnO}_4 \text{ goes to } \text{Mn}^{2+}. $ $\text{In acidic medium } \text{KMnO}_4 \text{ goes to } \text{Mn}^{2+} \text{ e.g. } \text{MnSO}_4. $ $\text{The } \text{KMnO}_4 \text{ has zero unpaired electrons (hence it is diamagnetic)} $ $\text{because it has Mn at +7 oxidation state (electronic configuration } (n-1)d^0ns^0). $ $\text{Mn}^{2+} \text{ has 5 unpaired electrons as it has } (n-1)d^5ns^0 \text{ electronic} $ $\text{configuration so it has 5.92 B.M. magnetic moment so difference will} $ $\text{be 5.92 B.M. Nearest integer = 6.}$

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
}