Import Question JSON

Current Question (ID: 18507)

Question:

$\text{The better reducing agent for ZnO is:}$

Options:

1. $\text{C}$
2. $\text{CO}$
3. $\text{CO}_2$
4. $\text{CO}_3^{2-}$

Solution:

$\text{C is better reducing agent than CO for reducing agent ZnO.}$ $\text{Reduction of ZnO to Zn is usually carried out at 1673 K.}$ $\text{From the above figure, it can be observed that above 1073 K, the Gibbs free energy of formation of CO from C and above 1273 K, the Gibbs free energy of formation of CO}_2 \text{ from C is lesser than the Gibbs free energy of formation of ZnO.}$ $\text{Therefore, C can easily reduce ZnO to Zn.}$ $\text{On the other hand, the Gibbs free energy of formation of CO}_2 \text{ from CO is always higher than the Gibbs free energy of formation of ZnO.}$ $\text{Therefore, CO cannot reduce ZnO.}$ $\text{Hence, C is a better reducing agent than CO for reducing ZnO.}$

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
}