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Current Question (ID: 21183)

Question:

$\text{Which of the following reactions is an example of a redox reaction?}$

Options:

1. $\text{XeF}_6 + \text{H}_2\text{O} \rightarrow \text{XeOF}_4 + 2\text{HF}$
2. $\text{XeF}_6 + 2\text{H}_2\text{O} \rightarrow \text{XeO}_2\text{F}_2 + 4\text{HF}$
3. $\text{XeF}_4 + \text{O}_2\text{F}_2 \rightarrow \text{XeF}_6 + \text{O}_2$
4. $\text{XeF}_2 + \text{PF}_5 \rightarrow [\text{XeF}]^{+1} + \text{PF}_6^{-}$

Solution:

$\text{Hint: The redox reaction is a type of chemical reaction that involves a transfer of electrons between two species.}$ $\text{Step 1:}$ $\text{In the first two reactions, the oxidation state of any element does not change. Hence, they are not an example of a redox reaction.}$ $\text{Step 2:}$ $\text{But in the third reaction, Xe oxidation state changes from +4 to +6, and it is an oxidation reaction.}$ $\text{The oxidation state of oxygen changes from +1 to zero. Hence, it is a reduction reaction.}$ $\text{Hence, it is a redox reaction.}$ $\text{The fourth reaction is also not a redox reaction because the oxidation state of any element does not change.}$

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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
}