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Current Question (ID: 18471)

Question:

$\text{Heterogeneous catalysis is shown in:}$

Options:

1. $2\text{SO}_2(g) + \text{O}_2(g) \xrightarrow{\text{Pt}(s)} 2\text{SO}_3(g)$
2. $4\text{NH}_3(g) + 3\text{H}_2(g) \xrightarrow{\text{Fe}(s)} 2\text{NH}_3(g)$
3. $\text{Vegetable oil}(l) + \text{H}_2(g) \xrightarrow{\text{Ni}(s)} \text{Vegetable ghee}(s)$
4. $\text{All of the above}$

Solution:

$\text{HINT: Heterogeneous catalysis is catalysis where the phase of catalysts differs from that of the reactants or products.}$ $\text{Explanation:}$ $(i) \text{Oxidation of sulphur dioxide to form sulphur trioxide. In this reaction, Pt acts as a catalyst.}$ $2\text{SO}_2(g) + \text{O}_2(g) \xrightarrow{\text{Pt}(s)} 2\text{SO}_3(g)$ $(ii) \text{Formation of ammonia by the combination of dinitrogen and dihydrogen in the presence of finely divided iron.}$ $4\text{NH}_3(g) + 3\text{H}_2(g) \xrightarrow{\text{Fe}(s)} 2\text{NH}_3(g)$ $\text{This process is called the Haber’s process.}$ $(iii) \text{Hydrogenation of vegetable oils in the presence of Ni.}$ $\text{Vegetable oil}(l) + \text{H}_2(g) \xrightarrow{\text{Ni}(s)} \text{Vegetable ghee}(s)$

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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
}