Import Question JSON

Current Question (ID: 18472)

Question:

$\text{KClO}_3$ $\text{on heating decomposes into}$ $\text{KCl and O}_2.$ $\text{If some MnO}_2$ $\text{is added, the reaction goes much faster because:}$ $1. \text{MnO}_2 \text{ decomposes to give oxygen.}$ $2. \text{MnO}_2 \text{ provides heat by reacting.}$ $3. \text{Better contact is provided by MnO}_2$ $4. \text{MnO}_2 \text{ acts as a catalyst.}$

Options:

1. $\text{MnO}_2 \text{ decomposes to give oxygen.}$
2. $\text{MnO}_2 \text{ provides heat by reacting.}$
3. $\text{Better contact is provided by MnO}_2$
4. $\text{MnO}_2 \text{ acts as a catalyst.}$

Solution:

$\text{(4) HINT: Positive catalyst speeds up the reaction.}$ $\text{Explanation:}$ $\text{In the presence of MnO}_2, \text{ KClO}_3 \text{ gives potassium chloride and oxygen directly at a lower temperature.}$ $\text{Manganese dioxide neither decomposes nor reacts with the given reactant.}$ $\text{It does not hinder the formation of the product either.}$ $\text{It acts as a positive catalyst here, increasing the speed of the reaction.}$

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
}