Import Question JSON

Current Question (ID: 10561)

Question:

$\text{The correct structure of pyrophosphoric acid is:}$

Options:

1. $\text{HO-P(=O)(OH)-OH}$
2. $\text{H-P(=O)(OH)-OH}$
3. $\text{H-P(=O)(OH)-H}$
4. $\text{HO-P(=O)(OH)-O-P(=O)(OH)-OH}$ (Correct)

Solution:

$\text{Hint: Pyrophosphoric acid contains P-O-P bond.}$ $\text{Explanation:}$ $\text{The molecular formula of pyrophosphoric acid is H}_4\text{P}_2\text{O}_7\text{ and its structure is shown in the diagram.}$ $\text{Pyrophosphoric acid has the structure: (HO)}_2\text{P(=O)-O-P(=O)(OH)}_2$ $\text{Key structural features:}$ $\text{- Contains two phosphorus atoms connected by an oxygen bridge (P-O-P bond)}$ $\text{- Each phosphorus atom has a double bond to oxygen (P=O)}$ $\text{- Each phosphorus atom is bonded to two hydroxyl groups (OH)}$ $\text{- The structure can be written as HO-P(=O)(OH)-O-P(=O)(OH)-OH}$ $\text{Pyrophosphoric acid is an ingredient of a radiopharmaceutical used to visualize bone abnormalities and cardiovascular abnormalities and also used as an ingredient in some products to prevent iron deficiency anemia.}$

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
}