Import Question JSON

Current Question (ID: 18734)

Question:

$\text{Which among the following is a diamagnetic complex?}$

Options:

1. $[\text{Ni} \; (\text{CN})_4]^{2-}$
2. $[\text{CuCl}_4]^{2-}$
3. $[\text{CoF}_6]^{3-}$
4. $[\text{NiCl}_4]^{2-}$

Solution:

$\text{CN}^- \text{ is a strong field ligand, so pairing will occur.}$ $\text{Diamagnetic compound contains zero unpaired electron.}$ $\text{Electronic configuration of } \text{Ni}^{2+} \text{ in } [\text{Ni} \; (\text{CN})_4]^{2-} \text{ is } \text{Ni}^{2+} = 3d^8 4s^0$ $\text{Ni}^{2+} \text{ has } dsp^2 \text{ hybridisation, as CN is strong field ligand}$ $\therefore [\text{Ni} \; (\text{CN})_4]^{2-} \text{ all the electrons are paired in the complex, therefore, it is diamagnetic in nature.}$

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
}