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Current Question (ID: 12444)

Question:

The type of primary xylem when protoxylem lies towards the pith is known as

Options:

1. endarch
2. exarch
3. endoexarch
4. Both (1) and (3)

Solution:

The type of primary xylem when protoxylem lies towards the pith is known as endarch. Endarch primary xylem is a type of primary xylem in which the protoxylem (the first-formed xylem elements) lies towards the center of the stem or root, while the metaxylem (the later-formed xylem elements) is towards the periphery. This type of primary xylem is commonly found in monocotyledonous plants and some early-diverging eudicotyledonous plants. Exarch primary xylem is a type of primary xylem in which the protoxylem lies towards the periphery of the stem or root, while the metaxylem is towards the center. This type of primary xylem is commonly found in most eudicotyledonous plants. Endoexarch is not a type of primary xylem, it is a combination of endarch and exarch.

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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
}