Import Question JSON

Current Question (ID: 9211)

Question:

$\text{Calcium hydride can be obtained by heating :}$

Options:

1. $\text{Calcium oxide with hydrogen.}$
2. $\text{Calcium oxide with hydrogen under pressure.}$
3. $\text{Calcium with hydrogen under pressure.}$
4. $\text{Calcium with hydrogen at a very low temperature.}$

Solution:

$\text{HINT: Ca and H}_2 \text{ under pressure and at high temperature gives CaH}_2$ $\text{Explanation:}$ $\text{Calcium hydride is prepared from its elements by a direct combination of calcium and hydrogen at 300 to 400°C.}$ $\text{Ca + H}_2 \rightarrow \text{CaH}_2$ $\text{By mixing CaH}_2 \text{ with the thermosetting resin, inorganic-organic hybrid material was prepared.}$ $\text{Pure CaH}_2 \text{ reacts vigorously with water to form hydrogen gas and Ca(OH)}_2\text{, while this hybrid material moderately produces hydrogen by reacting with water keeping a high reaction rate.}$

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
}