Import Question JSON

Current Question (ID: 8559)

Question:

$\text{The oxidation state of P in HPO}_3^{2-} \text{ is-}$

Options:

1. $+3$
2. $+4$
3. $+2$
4. $+5$

Solution:

$\text{Hint: Use the oxidation state of the individual elements to calculate the oxidation state of the P-atom}$ $\text{Step 1: Set up the oxidation state equation}$ $\text{Suppose that the O.N. of P in HPO}_3^{2-} \text{ be x.}$ $\text{Then, } 1 + x + 3(-2) = -2$ $\text{or, } x + 1 - 6 = -2$ $\text{or, } x = +3$ $\text{Step 2: Verification and conclusion}$ $\text{Therefore, the P atom in HPO}_3^{2-} \text{ has a +3 oxidation state.}$ $\text{Detailed breakdown:}$ $\text{For HPO}_3^{2-}\text{:}$ $\text{H contributes: +1}$ $\text{P contributes: x (unknown)}$ $\text{3 O atoms contribute: 3 × (-2) = -6}$ $\text{Total charge on ion: -2}$ $\text{Equation: (+1) + x + (-6) = -2}$ $\text{Solving: x - 5 = -2, therefore x = +3}$

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
}