Import Question JSON

Current Question (ID: 10902)

Question:

$\text{The effect that makes 2,3-dimethyl-2-butene more stable than 2-butene is-}$

Options:

1. $\text{Resonance}$
2. $\text{Hyperconjugation}$ (Correct)
3. $\text{Steric effect}$
4. $\text{Inductive effect}$

Solution:

$\text{Hint: } \sigma \text{ C-H/D/T conjugation to double bond, aromatic ring, carbocation, and radical.}$ $\text{Explanation:}$ $\text{The structures of the two given compounds are as follows:}$ $\text{H}_3\text{C} - \text{C} = \text{C} - \text{CH}_3$ $\text{with CH}_3 \text{ groups attached to both carbons of the double bond}$ $\text{2,3-Dimethylbut-2-ene}$ $\text{2-butene structure is shown with two CH}_3 \text{ groups on the terminal carbons}$ $\text{In 2,3-dimethyl-2-butene, total 12 hyperconjugation structures are formed whereas there are six hydrogens involved in hyperconjugation of 2-butene. In, 2-butene 6 hyperconjugation structures are formed. Hence, more hyperconjugation structures more are the stability. Thus, 2,3-dimethyl-2-butene is more stable than 2-butene.}$

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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
}