Import Question JSON

Current Question (ID: 8303)

Question:

\text{From the following bond energies:} \text{H-H bond energy: } 431.37 \text{ kJ mol}^{-1} \text{C=C bond energy: } 606.10 \text{ kJ mol}^{-1} \text{C-C bond energy: } 336.49 \text{ kJ mol}^{-1} \text{C-H bond energy: } 410.50 \text{ kJ mol}^{-1} \text{Enthalpy for the reaction:} \text{C}_2\text{H}_4 + \text{H}_2 \rightarrow \text{C}_2\text{H}_6 \text{will be:}

Options:

1. $1523.6\text{ kJ mol}^{-1}$
2. $-243.6\text{ kJ mol}^{-1}$
3. $-120.0\text{ kJ mol}^{-1}$
4. $553.0\text{ kJ mol}^{-1}$

Solution:

$\text{Hint: Bond energy of (reactants - products)}$ $\text{Enthalpy of reaction = energy of the bonds broken in reactant - the energy of the bonds being formed in the product}$ $\text{Calculate the enthalpy of reaction as follows:}$ $= (\text{C} = \text{C}) + 4(\text{C} − \text{H}) + \text{H} − \text{H} − \{6 \times \text{C} − \text{H} + (\text{C} − \text{C})\}$ $= (606 + 410.5 \times 4 + 431.37) − (410.5 \times 6 + 336.49)$ $= −120.0\text{ kJ mol}^{-1}$

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
}