Import Question JSON

Current Question (ID: 9150)

Question:

$\text{The commercial method of preparation of potassium by reduction of molten KCl with metallic sodium at 850°C is based on the fact that -}$

Options:

1. $\text{Potassium is solid and sodium distils off at 850°C.}$
2. $\text{Potassium is more volatile and distils off thus shifting the reaction forward.}$
3. $\text{Sodium is more reactive than potassium at 850°C.}$
4. $\text{Sodium has less affinity to chloride ions in the presence of potassium ions.}$

Solution:

$\text{Hint: In the reaction, potassium forms a vapour}$ $\text{In the commercial process, potassium chloride is melted with sodium metal by heating to 870°C. The reaction is as follows:}$ $\text{KCl} + \text{Na} \rightarrow \text{K} + \text{NaCl}$ $\text{At this temperature, potassium forms a vapour, which leaves the reaction chamber and is then condensed into photoelectric cells.}$ $\text{Hence, potassium is more volatile and distils off thus shifting the reaction forward.}$

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
}