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Current Question (ID: 18065)

Question:

$\text{A solution of acetone in ethanol:}$ $1. \text{ Shows a negative deviation from Raoult's law.}$ $2. \text{ Shows a positive deviation from Raoult's law.}$ $3. \text{ Behaves like a near ideal solution.}$ $4. \text{ Obeys Raoult's law.}$

Options:

1. $\text{Shows a negative deviation from Raoult's law.}$
2. $\text{Shows a positive deviation from Raoult's law.}$
3. $\text{Behaves like a near ideal solution.}$
4. $\text{Obeys Raoult's law.}$

Solution:

$\text{Hint: Interactions between acetone and ethanol is molecule are weaker than}$ $\text{acetone-acetone molecule or ethanol-ethanol molecule.}$ $\text{2. A solution of acetone in ethanol shows a positive deviation from Raoult's}$ $\text{law due to miscibility of these two liquids with difference of polarity and}$ $\text{length of hydrocarbon chain.}$ $\text{Main reason for positive deviation :}$ $\text{i) Due to the break of H bond between the molecule of ethanol.}$ $\text{ii) The components include can escape easily due to high vapour pressure.}$

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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
}