Import Question JSON

Current Question (ID: 17878)

Question:

$\text{Phytoplanktons kill the fish because:}$

Options:

1. $\text{Phytoplanktons decrease the BOD level that causes the death of fish.}$
2. $\text{Phytoplanktons increase the BOD level that causes the death of fish.}$
3. $\text{Phytoplanktons reduce the amount of dissolved CO}_2.$
4. $\text{None of the above.}$

Solution:

$\text{HINT: Phytoplankton increases BOD.}$ $\text{Explanation:}$ $\text{The abundance of phytoplanktons causes depletion of this dissolved oxygen. This is because phytoplanktons are degraded by bacteria present in water. For their decomposition, they require a large amount of oxygen.}$ $\text{Hence, they consume the oxygen dissolved in water. As a result, the BOD level of water increases, inhibiting the growth of fish and causing an excessive fish kill.}$ $\text{When too many nutrients are available, phytoplankton may grow out of control and form harmful algal blooms (HABs). These blooms can produce extremely toxic compounds that have harmful effects on fish, shellfish, mammals and birds.}$

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
}