Import Question JSON

Current Question (ID: 13494)

Question:

Which of the following is wrong about Coelenterata?

Options:

1. They are aquatic and exclusively marine animals.
2. Cnidarians exhibit tissue level of organisation and are diploblastic.
3. Some Cnidarians exhibit two forms namely Polyp and Medusa.
4. Cnidoblasts are present on tentacles and body.

Solution:

While all Coelenterates are aquatic some of them are fresh water as well e.g., Hydra. Coelenterata is an outdated and no longer used taxonomic term. The modern classification divides the group into two phyla: Cnidaria and Ctenophora. However, based on the given options, all of them are correct statements about Cnidarians, which are a phylum of aquatic animals that exhibit tissue-level organization, are diploblastic (having two germ layers), and have two forms, namely Polyp and Medusa. Cnidoblasts, also known as cnidocytes, are specialized cells that contain nematocysts, which are used for capturing prey and defense, and they are typically present on the tentacles and body of Cnidarians.

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
}