Import Question JSON

Current Question (ID: 7567)

Question:

$\text{The electronic configurations of Eu (Atomic no. 63), Gd (Atomic no. 64) and Tb}$ $\text{(Tb Atomic no. 65) are}$

Options:

1. $[\text{Xe}]4\text{f}^65\text{d}^16\text{s}^2, [\text{Xe}]4\text{f}^75\text{d}^16\text{s}^2 \text{ and } [\text{Xe}]4\text{f}^96\text{s}^2$
2. $[\text{Xe}]4\text{f}^65\text{d}^16\text{s}^2, [\text{Xe}]4\text{f}^75\text{d}^16\text{s}^2 \text{ and } [\text{Xe}]4\text{f}^85\text{d}^16\text{s}^2$
3. $[\text{Xe}]4\text{f}^76\text{s}^2, [\text{Xe}]4\text{f}^75\text{d}^16\text{s}^2 \text{ and } [\text{Xe}]4\text{f}^96\text{s}^2$
4. $[\text{Xe}]4\text{f}^76\text{s}^2, [\text{Xe}]4\text{f}^86\text{s}^2 \text{ and } [\text{Xe}]4\text{f}^85\text{d}^16\text{s}^2$

Solution:

$\text{Hint: Lanthanoid series}$\n\n$\text{Electronic configuration of }_{63}\text{Eu} = [\text{Xe}]_{54}4\text{f}^76\text{s}^2$\n\n$\text{Electronic configuration of }_{64}\text{Gd} = [\text{Xe}]_{54}4\text{f}^75\text{d}^16\text{s}^2$\n\n$\text{Electronic configuration of }_{65}\text{Tb} = [\text{Xe}]_{54}4\text{f}^96\text{s}^2$

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
}