Import Question JSON

Current Question (ID: 13563)

Question:

Select the option that correctly matches characteristic features with the group of three animals.

Options:

1. Skeleton of spicules – Sycon, Adamsia, Spongilla
2. Excretion by flame – Taenia, Fasciola, Ancylostoma
3. Mouth contains radula – Dentalium, Octopus, Ophiura
4. Jointed appendages – Limulus, Apis, Laccifer

Solution:

(4) In poriferans, the body is supported by a skeleton made up of spicules or spongin fibres. Sycon and Spongilla are examples of poriferans, whereas Adamsia is a cnidaria. In platyhelminths, specialised cells called flame cells help in excretion. Taenia and Fasciola are platyhelminths whereas Ancylostoma is an aschelminth. In molluscs, mouth contains a file-like rasping organ for feeding called radula. Dentalium and Octopus are molluscs whereas Ophiura is an echinoderm. Arthropods have jointed appendages. Limulus, Apis and Laccifer all three are arthropods.

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
}