Import Question JSON

Current Question (ID: 8439)

Question:
$\text{Match the following species with the corresponding conjugate acid:}$ $\text{Species: A. NH}_3\text{, B. HCO}_3^-\text{, C. H}_2\text{O, D. HSO}_4^-$ $\text{Conjugate acid: 1. CO}_3^{2-}\text{, 2. NH}_4^+\text{, 3. H}_3\text{O}^+\text{, 4. H}_2\text{CO}_3\text{, 5. H}_2\text{SO}_4$
Options:
  • 1. $\text{A-2, B-5, C-1, D-5}$
  • 2. $\text{A-2, B-4, C-3, D-5}$
  • 3. $\text{A-5, B-4, C-3, D-2}$
  • 4. $\text{A-4, B-5, C-3, D-2}$
Solution:
$\text{Hint: Conjugate acids are a type of acid that is formed when a base accepts a proton in solution.}$ $\text{Explanation:}$ $\text{As conjugate base} \rightarrow \text{Base + H}^+$ $\text{A. NH}_3 + \text{H}^+ \rightarrow \text{NH}_4^+ \text{ (conjugate acid is 2)}$ $\text{B. HCO}_3^- + \text{H}^+ \rightarrow \text{H}_2\text{CO}_3 \text{ (conjugate acid is 4)}$ $\text{C. H}_2\text{O} + \text{H}^+ \rightarrow \text{H}_3\text{O}^+ \text{ (conjugate acid is 3)}$ $\text{D. HSO}_4^- + \text{H}^+ \rightarrow \text{H}_2\text{SO}_4 \text{ (conjugate acid is 5)}$ $\text{Therefore, the correct matching is A-2, B-4, C-3, D-5}$

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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
}