Import Question JSON

Current Question (ID: 21316)

Question:

$\text{The hydrocarbon which can react with sodium in liquid ammonia is:}$

Options:

1. $\text{CH}_3\text{CH}_2\text{C} \equiv \text{CH}$
2. $\text{CH}_3\text{CH} = \text{CHCH}_3$
3. $\text{CH}_3\text{CH}_2\text{C} \equiv \text{CCH}_2\text{CH}_3$
4. $\text{CH}_3\text{CH}_2\text{CH}_2\text{C} \equiv \text{CCH}_2\text{CH}_2\text{CH}_3$

Solution:

$\text{(i) The hydrocarbon that has acidic hydrogen will react with sodium in liquid ammonia.}$ $\text{Terminal alkynes are much more acidic than most other hydrocarbons.}$ $\text{Removal of the proton leads to the formation of an acetylide anion, } \text{RC} \equiv \text{C}^-.$ $\text{(ii) The origin of the enhanced acidity can be attributed to the stability of the acetylide anion,}$ $\text{which has unpaired electrons in an sp hybridised orbital.}$ $\text{Among the given compounds, CH}_3\text{CH}_2\text{C} \equiv \text{CH has an acidic hydrogen.}$ $\text{So, it will react with sodium in liquid ammonia.}$ $\text{Hence, option 1 is the correct answer.}$

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
}