Import Question JSON

Current Question (ID: 14421)

Question:

The following statements refer to gas carriage by blood. Choose the correct statement:

Options:

1. After leaving the lungs, each litre of blood contains about 20 ml of oxygen.
2. Haemoglobin is half saturated with oxygen when the PO₂ is about 30 mm Hg.
3. As the PCO₂ rises, the affinity of haemoglobin for oxygen is increased.
4. Each litre of arterial blood contains about 50 mL of carbon dioxide.

Solution:

Statement 1 is incorrect. After leaving the lungs, each litre of blood contains about 200 ml of oxygen, not 20 ml. Statement 3 is incorrect. As the PCO₂ rises, the affinity of haemoglobin for oxygen is decreased, not increased. This is known as the Bohr effect. Statement 4 is incorrect. Each litre of venous blood contains about 50 mL of carbon dioxide, not arterial blood.

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
}