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Current Question (ID: 12438)

Question:

Sclerenchymatous fibres are

Options:

1. thick walled, elongated and pointed cells
2. contains simple and bordered pits
3. smallest cells in plant body
4. All of these

Solution:

Sclerenchymatous fibers are long, narrow cells with heavily thickened, lignified cell walls. They are usually pointed at the ends and occur in groups or strands, providing mechanical support to the plant. Sclerenchymatous fibers may be present in the cortex, pericycle, phloem, or xylem of the plant. They are commonly found in dicot stems and leaves, as well as in the husks of seeds and fruits. Simple and bordered pits are characteristic features of another type of sclerenchyma cell, sclereids, which are shorter and more variable in shape than fibers. Sclereids are often found in the shells of nuts, the husks of fruits, and the pits of drupes. The statement "smallest cells in plant body" is incorrect, as sclerenchymatous fibers are typically longer than most other types of plant cells, and may be several centimeters in length.

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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
}