Import Question JSON

Current Question (ID: 20978)

Question:

$\text{The pair of ions that is isoelectronic with } \text{Al}^{3+} \text{ ion is:}$

Options:

1. $\text{Mg}^{2+}, \text{O}^{2-}$
2. $\text{Na}^+, \text{N}^{2-}$
3. $\text{C}^{4-}, \text{Cl}^-$
4. $\text{F}^-, \text{Mg}^+$

Solution:

$\text{Hint: Count electrons to find isoelectronic ions.}$ $\text{Species: Al}^{3+}, \text{Mg}^{2+}, \text{O}^{2-}, \text{Na}^+, \text{N}^{2-}, \text{C}^{4-}$ $\text{Number of e}^-: 10, 10, 10, 10, 9, 10$ $\text{So } \text{Mg}^{2+} \text{ and } \text{O}^{2-} \text{ are isoelectronic with } \text{Al}^{3+}$

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
}