Import Question JSON

Current Question (ID: 18483)

Question:

$\text{Consider the following reaction.}$ $\text{Bauxite ore} + \text{NaOH (conc.)} \xrightarrow{\text{Digester} \ \Delta} (\text{A})_{\text{Soluble}}$ $\text{(A)} \xrightarrow{\text{Fresh Al(OH)}_3} (\text{B})_{\text{White}} + (\text{C})$ $\text{(B)} \xrightarrow{\Delta} (\text{D}) + \text{H}_2\text{O}$ $\text{What is the molecular formula of compound D?}$

Options:

1. $\text{NaAlO}_2$
2. $\text{Al(OH)}_3$
3. $\text{Al}_2\text{O}_3$
4. $\text{Na}_2\text{O}$

Solution:

$\text{HINT: Leaching of alumina from bauxite.}$ $\text{Explanation:}$ $\text{The bauxite reacts with sodium hydroxide and forms a soluble salt}$ $\text{Na[Al(OH)}_4].$ $\text{The soluble salt is converted into aluminium hydroxide and on heating, aluminium hydroxide is converted into aluminium oxide.}$ $\text{The reaction is as follows:}$ $\text{Al}_2\text{O}_3 \cdot x\text{H}_2\text{O} + \text{conc. NaOH} \rightarrow \text{Residue} + \text{Na[Al(OH)}_4]$ $\text{Al(OH)}_3 + \text{NaOH} \rightarrow \text{Al}_2\text{O}_3(s) + \text{H}_2\text{O} \uparrow$

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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
}