Import Question JSON

Current Question (ID: 18186)

Question:

$\text{On the electrolysis of brine (aq NaCl solution):}$ $1.\ \text{pH of the solution will rise.}$ $2.\ \text{pH of the solution will fall.}$ $3.\ \text{No change in the pH of the solution.}$ $4.\ \text{None of the above.}$

Options:

1. $\text{pH of the solution will rise.}$
2. $\text{pH of the solution will fall.}$
3. $\text{No change in the pH of the solution.}$
4. $\text{None of the above.}$

Solution:

$\text{The pH of the solution will rise as NaOH is formed in the electrolytic cell.}$ $\text{Chemical reaction occurring at cell when aqueous brine solution is}$ $\text{electrolysed are as follows:}$ $\text{NaCl(aq)} \xrightarrow{\text{H}_2\text{O}} \text{Na}^+(aq) + \text{Cl}^-(aq)$ $2\text{H}^+ + 2\text{e}^- \rightarrow \text{H}_2(\text{At cathode})$ $2\text{Cl}^- \rightarrow \text{Cl}_2 + 2\text{e}^- (\text{At anode})$ $\text{Net reaction}$ $\text{NaCl(aq)} + \text{H}_2\text{O}(l) \rightarrow \text{Na}^+(aq) + \text{OH}^-(aq) + \frac{1}{2}\text{H}_2 + \frac{1}{2}\text{Cl}_2$

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
}