Import Question JSON

Current Question (ID: 18805)

Question:

$\text{The number of unpaired electrons in the gaseous ions } \text{Mn}^{3+}, \text{Cr}^{3+}, \text{V}^{3+}, \text{ and } \text{Ti}^{3+} \text{ are, respectively:}$

Options:

1. $3, 2, 3, \text{ and } 1$
2. $2, 2, 3, \text{ and } 1$
3. $4, 3, 2, \text{ and } 1$
4. $1, 2, 3, \text{ and } 4$

Solution:

$\text{Hint: Follow the electronic configuration of given ions.}$ $\text{Explanation:}$ $\begin{array}{ll} \text{Gaseous ions} & \text{Number of unpaired electrons} \\ \text{(i) } \text{Mn}^{2+}, [\text{Ar}]3d^4 & 4 \\ \text{(ii) } \text{Cr}^{2+}, [\text{Ar}]3d^3 & 3 \\ \text{(iii) } \text{V}^{3+}, [\text{Ar}]3d^2 & 2 \\ \text{(iv) } \text{Ti}^{3+}, [\text{Ar}]3d^1 & 1 \end{array}$

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
}