Import Question JSON

Current Question (ID: 9106)

Question:

$\text{The incorrect statement among the following regarding Lithium is that-}$

Options:

1. $\text{The hydroxide, carbonate and nitrate decompose to give the oxide on heating.}$
2. $\text{It is the most electronegative element of group IA.}$
3. $\text{The hydrogen carbonate cannot be isolated as a stable solid.}$
4. $\text{It forms superoxide.}$

Solution:

$\text{HINT: Li forms oxide only.}$ $\text{Explanation:}$ $\text{1.) Hydroxide, carbonate and nitrate are less stable. Thus, they decompose on heating and give oxide.}$ $\text{2.) Down the group electronegativity decreases. Hence, Li is the most electronegative element of group IA.}$ $\text{3.) Lithium forms an oxide } \text{Li}_2\text{O}, \text{ but not the peroxide or superoxide because the strong polarising power of a small-sized } \text{Li}^+ \text{ ion is strong enough to restrict the oxidation of an oxide ion } \text{O}^{2-} \text{ to the peroxide ion, } \text{O}_2^{2-}$

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
}