Import Question JSON

Current Question (ID: 8630)

Question:

$\text{The correct statement about the electrolysis of an aqueous solution of AgNO}_3 \text{ with Pt electrode is:}$

Options:

1. $\text{Pt(s) gets oxidized at cathode whereas Ag}^+\text{(aq) gets reduced at anode}$
2. $\text{Ag}^+\text{(aq) gets reduced at cathode and is oxidized at anode}$
3. $\text{Ag}^+\text{(aq) gets reduced at cathode whereas water is oxidized at anode}$
4. $\text{Ag(s) gets oxidized at cathode whereas H}_2\text{O is oxidised at anode}$

Solution:

$\text{Hint: Platinum electrode is non-reactive}$ $\text{Pt cannot be oxidized easily because it is nonreactive. Hence, at the anode, oxidation of water occurs to liberate O}_2. \text{ At the cathode, Ag}^+ \text{ ions are reduced and get deposited.}$ $\text{The reactions are as follows:}$ $\text{Anode : } 2\text{H}_2\text{O}_{(\text{l})} \rightarrow \text{O}_{2(\text{g})} + 4\text{H}^+_{(\text{aq})} + 4\text{e}^-$ $\text{Cathode : Ag}^+_{(\text{aq})} + \text{e}^- \rightarrow \text{Ag}_{(\text{s})}$ $\text{Therefore, Ag}^+ \text{ gets reduced at cathode whereas water is oxidized at anode.}$

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
}