Import Question JSON

Current Question (ID: 18479)

Question:

$\text{From the following, the ores that are concentrated by froth flotation are:}$ $\begin{array}{ll} \text{a. Haematite} & \text{b. Galena} \\ \text{c. Copper pyrites} & \text{d. Magnetite} \end{array}$ $\text{Choose the correct option:}$

Options:

1. $\text{a and b}$
2. $\text{b and c}$
3. $\text{c and d}$
4. $\text{a and d}$

Solution:

$\text{HINT: Sulphide ores are extracted by froth floatation method.}$ $\text{Explanation:}$ $\text{The basic principle applied in the process of Froth Flotation is the difference}$ $\text{in the wetting ability of the ore and remaining impurities.}$ $\text{Haematite (Fe}_2\text{O}_3\text{) and magnetite (Fe}_3\text{O}_4\text{) are oxide ores while galena}$ $\text{(PbS) and copper pyrites (Cu)FeS}_2\text{ are sulphide ores. As we know}$ $\text{sulphide ores are extracted by using froth floatation method.}$ $\text{Hence, (b) and (c) are the correct choices.}$

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
}