Import Question JSON

Current Question (ID: 8445)

Question:

$\text{OH}^-, \text{F}^-, \text{H}^+ \text{ and BCl}_3$ $\text{The species described above that contain Lewis acids are:}$

Options:

1. $\text{BCl}_3 \text{ and F}^-$
2. $\text{OH}^- \text{ and F}^-$
3. $\text{H}^+ \text{ and BCl}_3$
4. $\text{F}^- \text{ and BCl}_3$

Solution:

$\text{Hint: A Lewis acid is a chemical species that is capable of accepting an electron pair.}$ $\text{Explanation:}$ $\text{(a) OH}^- \text{ is a Lewis base since it can donate its lone pair of electrons.}$ $\text{(b) F}^- \text{ is a Lewis base since it can donate a pair of electrons.}$ $\text{(c) H}^+ \text{ is a Lewis acid since it can accept a pair of electrons because of electron deficiency.}$ $\text{(d) BCl}_3 \text{ is a Lewis acid since boron can accept a pair of electrons in an empty p-orbital to complete its octet.}$

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
}