Import Question JSON

Current Question (ID: 18899)

Question:

$\text{Which of the following pairs of substances on reaction will not evolve gas?}$

Options:

1. $\text{Iron, and } \text{H}_2\text{SO}_4 \text{ (aq)}$
2. $\text{Iron, and steam}$
3. $\text{Copper, and HCl(g)}$
4. $\text{Sodium, and ethyl alcohol}$

Solution:

$\text{HINT: Cu is placed below H in electrochemical series.}$ $\text{Explanation:}$ $\text{The reactions for given reagents are:}$ $1. \text{Fe(s)} + \text{H}_2\text{SO}_4\text{(aq)} \rightarrow \text{FeSO}_4\text{(aq)} + \text{H}_2\text{(g)}$ $2. 3\text{Fe} + 4\text{H}_2\text{O(steam)} \rightarrow \text{Fe}_3\text{O}_4 + \text{H}_2\text{(g)}$ $3. \text{Copper and HCl(g) = No reaction}$ $4. \text{Na} + \text{C}_2\text{H}_5\text{O} \rightarrow \text{C}_2\text{H}_5\text{O}^-\text{Na}^+ + \text{H}_2\text{(g)}$

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
}