Import Question JSON

Current Question (ID: 7976)

Question:

If the electronic configuration of an element is $1s^2 2s^2 2p^6 3s^2 3p^6 3d^2 4s^2$, the four electrons that participate in the chemical bond formation will be from :

Options:

1. $3p^6$
2. $3p^6, 4s^2$
3. $3p^6, 3d^2$
4. $3d^2, 4s^2$ (Correct)

Solution:

HINT: Electrons of $ns$ and $(n-1)d$ subshell take part in bond formation. Explanation: STEP 1: The given electronic configuration shows that an element is a vanadium ($Z = 22$). It belongs to the d-block of the periodic table. In transition elements i.e., d-block elements, electrons of $ns$ and $(n-1)d$ subshell take part in bond formation. STEP 2: Hence, $3d$ and $4s$ electrons participate in bond formation. Therefore, option 4 is the correct answer.

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
}