Import Question JSON

Current Question (ID: 8709)

Question:

$\text{The incorrect statement among the following regarding reaction of H}_2\text{O}_2\text{ is -}$

Options:

1. $\text{S}^{-2}\rightarrow\text{S (acidic medium)}$
2. $\text{Pb}\rightarrow\text{PbSO}_4$
3. $\text{Fe}^{3+}\rightarrow\text{Fe}^{2+}\text{ (acidic medium)}$
4. $\text{KI}\rightarrow\text{I}_2$

Solution:

\text{Hint: H}_2\text{O}_2 \text{ oxidises acidified ferrous salt to ferric salt.} \text{Explanation:} \text{H}_2\text{O}_2 \text{ oxidises ferrous ion in acidic medium to ferric ion. The reaction is:} 2\text{Fe}^{2+} + \text{H}_2\text{O}_2 + 2\text{H}^{+} \rightarrow 2\text{Fe}^{3+} + 2\text{H}_2\text{O} \text{Hence, option third is the answer.} \text{H}_2\text{O}_2 \text{ oxidises Fe}^{2+} \rightarrow \text{Fe}^{3+} \text{ in acidic medium.}

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
}