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Current Question (ID: 13294)

Question:
Which one of the following is a matching pair of certain organism(s) and the kind of association?
Options:
  • 1. Shark and sucker fish - predation
  • 2. Algae and fungi in lichens - mutualism
  • 3. Orchids growing on trees - parasitism
  • 4. Cuscuta (dodder) growing in other flowering plants - epiphytism
Solution:
The association between fungi and algae in lichen is regarded as the true mutual relationship, in which both the partners are benefitted. In lichen, fungus lives on the algae which manufactures food by virtue of the chlorophyll present in its cells, while the algae enjoys the protection afforded by the fungal envelope, to live in very dry conditions. PAGE 237, XII NCERT

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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
}