Import Question JSON

Current Question (ID: 10588)

Question:

$\text{A compound 'X', upon reaction with } \text{H}_2\text{O}, \text{ produces a colourless gas 'Y' with a rotten fish smell. Gas 'Y' is absorbed in a solution of } \text{CuSO}_4 \text{ to give } \text{Cu}_3\text{P}_2 \text{ as one of the products. The compound 'X' will be:}$

Options:

1. $\text{Ca}_3\text{P}_2$ (Correct)
2. $\text{NH}_4\text{Cl}$
3. $\text{As}_2\text{O}_3$
4. $\text{Ca}_3(\text{PO}_4)_2$

Solution:

$\text{Hint: Reaction of phosphide with water to produce phosphine & Chemical properties of phosphine}$ $\text{Explanation:}$ $\text{Doing hydrolysis of calcium phosphide with water or dil. HCl.}$ $\text{Ca}_3\text{P}_2 \text{ (X) } + 6\text{H}_2\text{O} \rightarrow 3\text{Ca(OH)}_2 + 2\text{PH}_3 \text{ (Y)}$ $\text{When phosphine is passed through copper sulphate solution, a black precipitate of cupric phosphide is formed.}$ $\text{CuSO}_4 + 2\text{PH}_3 \rightarrow \text{Cu}_3\text{P}_2 + 3\text{H}_2\text{SO}_4$ $\text{Hence, option 1 is the correct answer}$

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
}