Import Question JSON

Current Question (ID: 8673)

Question:

\text{Match the column:-} \text{Column I} \qquad \text{Column II} \text{A. Heavy water} \qquad \text{P. Bicarbonates of Ca and Mg} \text{B. Temporary hardness} \qquad \text{Q. No foreign ions} \text{C. Soft water} \qquad \text{R. } \text{D}_2\text{O} \text{D. Permanent Hardness} \qquad \text{S. Sulphates of Ca and Mg}

Options:

1. $\text{A-S, B-P, C-Q, D-R}$
2. $\text{A-R, B-P, C-Q, D-S}$
3. $\text{A-P, B-Q, C-R, D-S}$
4. $\text{A-S, B-R, C-P, D-Q}$

Solution:

$\text{Hint: Heavy water is D}_2\text{O.}$ $\text{Explanation:}$ $\text{Permanent hardness is due to the presence of soluble salts of magnesium}$ $\text{and calcium in the form of chlorides and sulphates in water.}$ $\text{Temporary hardness is due to the presence of magnesium and calcium}$ $\text{hydrogen carbonates.}$ $\text{Soft water did not contain any foreign particles or ions.}$ $\text{Heavy water is D}_2\text{O.}$ $\text{Hence, option 2 is the correct answer.}$

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
}