Import Question JSON

Current Question (ID: 9198)

Question:

$\text{Magnesia can be prepared by -}$

Options:

1. $\text{Burning Mg in air.}$
2. $\text{Heating hydroxide, nitrate, sulphate or carbonate of magnesium.}$
3. $\text{Heating Mg in steam.}$
4. $\text{All of the above.}$

Solution:

$\text{Hint: MgO is known as Magnesia.}$ $\text{Explanation:}$ $\text{All the given methods can be used to prepare magnesia.}$ $\text{Chemical reactions for the preparation of magnesia are:}$ $1. \; 2\text{Mg} + \text{O}_2 \rightarrow 2\text{MgO}$ $2. \; 2\text{Mg}(\text{NO}_3)_2 \xrightarrow{\Delta} 2\text{MgO} + 4\text{NO}_2 + \text{O}_2$ $3. \; 2\text{MgSO}_4 \xrightarrow{\Delta} 2\text{MgO} + \text{SO}_3 + \text{SO}_2 + \text{O}_2$ $4. \; \text{Mg} + \text{H}_2\text{O}_{(\text{steam})} \rightarrow \text{MgO} + \text{H}_2$ $\text{Magnesia is a white hygroscopic solid mineral that occurs naturally as periclase and is a source of magnesium.}$ $\text{It's used to treat a variety of conditions, including heartburn, indigestion, constipation, magnesium deficiency, and other ailments.}$

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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
}