Import Question JSON

Current Question (ID: 18791)

Question:

$\text{The correct statement(s) regarding the oxidation state of transition elements is/are:}$ $1.\ \text{The oxidation state can vary from } +1 \text{ to } +7$ $2.\ \text{Variable oxidation states are possible.}$ $3.\ \text{Both (1) and (2)}$ $4.\ \text{None of the above}$

Options:

1. $\text{The oxidation state can vary from } +1 \text{ to } +7$
2. $\text{Variable oxidation states are possible.}$
3. $\text{Both (1) and (2)}$
4. $\text{None of the above}$

Solution:

$\text{Hint: Transition metals have (n-1)d orbitals empty that are closer to the outermost ns orbital in energy levels.}$ $\text{Explanation:}$ $\text{In transition elements, the oxidation state can vary from } +1 \text{ to } +7 \text{ the highest oxidation state by removing all its valence electrons.}$ $\text{Also, in transition elements, the oxidation states differ by 1 e.g. } \text{Fe}^{2+}/\text{Fe}^{3+}, \text{Cu}^{+}/\text{Cu}^{2+}. $ $\text{In non-transition elements, the oxidation states differ by 2, for example, } +2 \text{ and } +4 \text{ or } +3 \text{ and } +5, \text{ etc.}$

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
}