Import Question JSON

Current Question (ID: 21382)

Question:

$\text{Identify the change in Mn's oxidation state during the cell reaction in a dry cell while powering a clock.}$

Options:

1. $+3 \rightarrow +4$
2. $+2 \rightarrow +7$
3. $+4 \rightarrow +3$
4. $+7 \rightarrow +2$

Solution:

$\text{Hint: } \text{MnO}_2 + \text{NH}_4^+ + e^- \rightarrow \text{MnO(OH)} + \text{NH}_3$ $\text{Discharging cell reaction of dry cell}$ $\text{Zn(s)} + 2\text{MnO}_2(\text{s}) + 2\text{NH}_4\text{Cl(s)} \rightarrow \text{ZnCl}_2(\text{s}) + 2\text{MnO(OH)(s)} + 2\text{NH}_3 \uparrow$

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
}