Import Question JSON

Current Question (ID: 8665)

Question:

$\text{Metallic hydrides are useful for hydrogen storage because :}$

Options:

1. $\text{Metallic hydrides are oxygen-rich.}$
2. $\text{Metallic hydrides are oxygen-deficient.}$
3. $\text{Metallic hydrides are hydrogen-rich.}$
4. $\text{Metallic hydrides are hydrogen-deficient.}$

Solution:

$\text{HINT: Metal hydrides are hydrogen deficient.}$ $\text{Explanation:}$ $\text{Metallic hydrides do not follow the law of constant composition.}$ $\text{It has been established that in the hydrides of Ni, Pd, Ce, and Ac,}$ $\text{hydrogen occupies the interstitial position in lattices allowing further}$ $\text{absorption of hydrogen on these metals.}$ $\text{Metals like Pd, Pt, etc. have the capacity to accommodate a large volume}$ $\text{of hydrogen. Therefore, they are used for the storage of hydrogen and serve}$ $\text{as a source of energy.}$

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
}