Import Question JSON

Current Question (ID: 21545)

Question:

$\text{The incorrect statement among the following is:}$ $1.\ \text{VOSO}_3\ \text{is a reducing agent.}$ $2.\ \text{Cr}_2\text{O}_4\ \text{is an amphoteric oxide.}$ $3.\ \text{RuO}_4\ \text{is an oxidizing agent.}$ $4.\ \text{Red color of ruby is due to the presence of } \text{Co}^{3+}.$

Options:

1. $\text{VOSO}_3\ \text{is a reducing agent.}$
2. $\text{Cr}_2\text{O}_4\ \text{is an amphoteric oxide.}$
3. $\text{RuO}_4\ \text{is an oxidizing agent.}$
4. $\text{Red color of ruby is due to the presence of } \text{Co}^{3+}.$

Solution:

$(i)\ \text{In VOSO}_4,\ 'V'\ \text{is in } +2\ \text{oxidation state. So it act as oxidising agent.}$ $(ii)\ \text{Cr}_2\text{O}_3\ \text{is an amphoteric oxide.}$ $(iii)\ \text{In RuO}_4,\ 'Ru'\ \text{is in } +8\ \text{oxidation state. So it act as oxidising agent.}$ $(iv)\ \text{red color of Ruby is due to the } d-d\ \text{transition of } \text{Cr}^{3+}\ \text{ion in the } \text{Al}_2\text{O}_3\ \text{lattice.}$

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
}