Import Question JSON

Current Question (ID: 18544)

Question:

$\text{An electrochemical process is used to extract:}$

Options:

1. $\text{Iron}$
2. $\text{Lead}$
3. $\text{Sodium}$
4. $\text{Silver}$

Solution:

$\text{HINT: It is used to extract sodium.}$ $\text{Explanation:}$ $1. \text{Iron is extracted from iron ore in a huge container called a blast furnace.}$ $\text{Iron ores such as haematite contain iron(III) oxide, Fe}_2\text{O}_3.$ $\text{The oxygen must be removed from the iron(III) oxide in order to leave the iron behind.}$ $\text{Reactions in which oxygen is removed are called reduction reactions.}$ $2. \text{Lead is extracted from its ore by reduction with carbon or by self-reduction.}$ $3. \text{Electrochemical process (electrolysis of fused salt) is used to extract Sodium.}$ $\text{Normally, the salt extraction process is an electrolytic method used to extract the valuable metals from the slag,}$ $\text{low-grade ores as well as other materials using the molten salts.}$ $4. \text{Silver is found in lead, zinc, gold and copper ore deposits.}$ $\text{The most important ore mineral of silver is argentite (Ag}_2\text{S, silver sulfide).}$ $\text{Silver is commonly extracted from ore by smelting or chemical leaching.}$

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
}