Import Question JSON

Current Question (ID: 17615)

Question:

$1,2\text{-dibromopropane on treatment with } X \text{ moles of } \text{NaNH}_2 \text{ followed by treatment with ethyl bromine gave a pent-2-yne. The value of } X \text{ is -}$

Options:

1. $1$
2. $2$
3. $3$
4. $4$

Solution:

$\text{Hint: In this process, dehydrohalogenation reactions occur two times.}$ $\text{When vicinal dihalide reacts with 2 moles of } \text{NaNH}_2 \text{ then a double dehydrohalogenation reaction occurs and an alkyne is obtained as a product.}$ $\text{It is a type of elimination reaction. The reaction is as follows:}$ $\text{From the sequence of reactions, it is clear that three moles of } \text{NaNH}_2 \text{ are used.}$

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
}