Import Question JSON

Current Question (ID: 20989)

Question:

$\text{Find out the magnetic properties of } \text{Li}_2\text{O}, \text{KO}_2, \text{and MgO in that order.}$

Options:

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

Solution:

$\text{Li}_2\text{O has Li}^{+} \text{ and O}^{2-}. \text{ Both the cation and anion have all their electrons paired. So, it is diamagnetic.}$ $\text{KO}_2 \text{ has K}^{+} \text{ and O}_2^{-}. \text{ It is paramagnetic as O}_2^{-} \text{ has one unpaired electron.}$ $\text{O}_2^{-} : \sigma 1s^2 \sigma *1s^2 \sigma 2s^2 \sigma *2s^2 \sigma 2p_x^2 \pi 2p_y^2 \pi 2p_z^1 = \pi 2p_y \pi *2p_x^2 = \pi *2p_y^1$ $\text{MgO has Mg}^{2+} \text{ and O}^{2-}. \text{ It is diamagnetic as Mg}^{2+} \text{ and O}^{2-} \text{ have all their electrons paired.}$

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
}