Import Question JSON

Current Question (ID: 18003)

Question:

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

Options:

1. $\text{Density decreases in case of crystals with Schottky's defect.}$
2. $\text{NaCl(s) is insulator, silicon is semiconductor, silver is conductor, quartz is piezo electric crystal.}$
3. $\text{Frenkel defect is favoured in those ionic compounds in which sizes of cations and anions have large difference.}$
4. $\text{Fe}_{0.98}\text{O has non stoichiometric metal excess defect.}$

Solution:

$\text{HINT: } \text{Fe}_{0.98}\text{O has non stoichiometric metal deficiency defect.}$ $\text{Explanation:}$ $\text{Fe}_{0.93-0.98}\text{O}_{1.00}\text{ is a non-stoichiometric ferrous oxide which is formed due to the metal deficiency defect.}$ $\text{This happens due to the presence of Ferrous as well as Ferric ions in the crystal.}$ $\text{So, option 4 is the correct answer.}$

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
}