Import Question JSON

Current Question (ID: 21337)

Question:

$\text{Identify the correct statement on physical properties of (A) and (B):}$ $\text{Birch Reduction} \rightarrow (\text{A})$ $+\text{H}_2, \text{Lindlar's catalyst} \rightarrow (\text{B})$ $\text{CH}_3\equiv\text{C}-\text{C}\equiv\text{CH}_3$

Options:

1. $\text{Melting Point: A > B; Boiling Point: A > B}$
2. $\text{Melting Point: A < B; Boiling Point: A > B}$
3. $\text{Melting Point: A > B; Boiling Point: A < B}$
4. $\text{Melting Point: A < B; Boiling Point: A < B}$

Solution:

$\text{The reactions involved are:}$ $\text{Birch Reduction} \rightarrow \text{trans-alkene}$ $+\text{H}_2, \text{Lindlar's catalyst} \rightarrow \text{cis-alkene}$ $\text{Compound (A) is non polar, whereas compound (B) is polar.}$ $\text{Compound (A) will have lower boiling point than (B) due to dipole-dipole interaction in (B).}$ $\text{Compound (A) is symmetrical with respect to compound (B), thus the packing will be better in (A).}$ $\text{Hence, (A) will have higher melting point than B.}$ $\text{Hence, option 3 is the correct answer.}$

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
}