Import Question JSON

Current Question (ID: 10964)

Question:

$\text{The acid used for the acidification of sodium extract for testing sulphur is:}$

Options:

1. $\text{Sulphuric acid}$
2. $\text{Acetic acid}$ (Correct)
3. $\text{Nitric acid}$
4. $\text{Hydrochloric acid}$

Solution:

$\text{Hint: The addition of sulphuric acid will precipitate lead sulphate}$ $\text{Step 1:}$ $\text{The addition of acetic acid will ensure the complete precipitation of sulfur in the form of lead sulphate due to the common ion effect. Hence, it is necessary to use acetic acid for the acidification of sodium extract for testing sulfur by lead acetate test.}$ $\text{Step 2:}$ $\text{Sulphur sodium extract is acidified with acetic acid because lead acetate is soluble and does not interfere with the test.}$ $\text{Pb(OCOCH}_3)_2 + \text{H}_2\text{SO}_4 \rightarrow \text{PbSO}_4 + 2\text{CH}_3\text{COOH}$

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
}