Import Question JSON

Current Question (ID: 20965)

Question:

$\text{According to molecular orbital theory, which of the following molecules is not expected to be stable?}$

Options:

1. $\text{He}_2^{2+}$
2. $\text{He}_2^{+}$
3. $\text{H}_2^{-}$
4. $\text{H}_2^{2-}$

Solution:

$\text{Hint: If the species has zero bond order then it will not exist}$ $\text{Step 1:}$ $\text{In } \text{H}_2^{2-}, \text{ four electrons are present. The electronic configuration is}$ $\sigma_{2s}^2 \sigma_{2s}^*{}^2$ $\text{B. O.} = \frac{2-2}{2} = 0$ $\text{Therefore, It does not exist as the bond order is zero.}$ $\text{Step 2:}$ $\text{The bond order for other species is as follows:}$ $\text{He}_2^{2+} = 1$ $\text{He}_2^{+} = 0.5$ $\text{H}_2^{-} = 0.5$

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
}