Import Question JSON

Current Question (ID: 18485)

Question:

$\text{The substance that acts as a collector in the froth flotation method is:}$

Options:

1. $\text{Sodium xenate.}$
2. $\text{Sodium pyrophosphate.}$
3. $\text{Sodium nitroprusside.}$
4. $\text{Sodium ethyl xanthate.}$

Solution:

$\text{Hint: Collectors are a type of surfactant that increase the natural hydrophobicity of the surface.}$ $\text{Explanation:}$ $\text{Sodium ethyl xanthate acts as collector for sulphide ore.}$ $\text{Froth floatation process used for the concentration of sulphide ore uses sodium ethylxanthate (CH}_3 \text{CH}_2 \text{OCS}_2 \text{Na}) \text{ collector.}$ $\text{Other examples of collector include ethyl xanthate and potassium ethyl xanthate. They attach themselves to the grains of mineral by polar groups so that minerals become water repellent and pass on into the froth. The enhance non-wettability of the mineral particles.}$

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
}