Import Question JSON

Current Question (ID: 9128)

Question:

$\text{The incorrect statement regarding Be(II group) is -}$

Options:

1. $\text{It forms an ionic carbide.}$
2. $\text{Its carbonate decomposes on heating.}$
3. $\text{Its halides are covalent.}$
4. $\text{It is easily attacked by water.}$

Solution:

$\text{HINT: Be is not easily attacked by water.}$ $\text{Explanation:}$ $\text{Be has maximum tendency to form covalent compounds among IIA group elements and does not decompose water even on boiling with it.}$ $\text{BeCO}_3 \text{ is very unstable mainly because of the enhanced stability of BeO over BeCO}_3\text{. Cations with high ionic potential have large power of polarisation. In crystalline solid, the M}^{2+} \text{ cation is surrounded by oxygen of CO}_3^{2-} \text{ ions.}$ $\text{Also, Beryllium carbide is an ionic compound.}$

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
}