Import Question JSON

Current Question (ID: 21290)

Question:

$\text{Which of the following will give a positive Lassaigne's test?}$

Options:

1. $\text{NH}_4\text{OH}$
2. $\text{NH}_4\text{Cl}$
3. $\text{N}_2\text{H}_4$
4. $\text{CH}_3 - \text{NH}_2$

Solution:

$\text{Hint: Molecule must contain carbon and nitrogen}$ $\text{The elements present in the compound are converted from the covalent form into the ionic form by fusing the compound with sodium metal. An organic compound contains carbon and nitrogen from NaCN when the organic compound reacts with sodium.}$ $\text{Those compound which doesn't contain carbon and nitrogen will not give Lassaigne's test.}$ $\text{Thus, CH}_3 - \text{NH}_2 \text{ will give a positive Lassaigne test.}$ $\text{Hence, option 4th is the correct answer.}$

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
}