Import Question JSON

Current Question (ID: 8587)

Question:

$\text{The oxidation number of oxygen in } \text{KO}_3 \text{ and } \text{Na}_2\text{O}_2 \text{ is respectively -}$

Options:

1. $3, \text{ and } 2$
2. $1, \text{ and } 0$
3. $0, \text{ and } 1$
4. $-0.33, \text{ and } -1$

Solution:

$\text{For } \text{KO}_3 \text{ (potassium superoxide):}$ $\text{K has oxidation state } +1$ $\text{Let oxygen oxidation state be } x$ $\text{For neutral compound: } (+1) + 3x = 0$ $3x = -1$ $x = -\frac{1}{3} = -0.33$ $\text{For } \text{Na}_2\text{O}_2 \text{ (sodium peroxide):}$ $\text{Na has oxidation state } +1$ $\text{Let oxygen oxidation state be } x$ $\text{For neutral compound: } 2(+1) + 2x = 0$ $2x = -2$ $x = -1$ $\text{Therefore, the oxidation numbers of oxygen in } \text{KO}_3 \text{ and } \text{Na}_2\text{O}_2 \text{ are } -0.33 \text{ and } -1 \text{ respectively.}$

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
}