Import Question JSON

Current Question (ID: 8678)

Question:

$\text{The method used to remove the temporary hardness of water is-}$

Options:

1. $\text{Synthetic resins method}$
2. $\text{Calgon's method}$
3. $\text{Clark's method}$
4. $\text{Ion-exchange method}$

Solution:

$\text{Hint: Lime is used to remove temporary hardness.}$ $\text{Clark's method:}$ $\text{Lime softening, also known as Clark's process, is a type of water treatment}$ $\text{used for water softening which uses the addition of limewater (calcium}$ $\text{hydroxide) to remove hardness (calcium and magnesium) ions by}$ $\text{precipitation.}$ $\text{Ca}(\text{HCO}_3)_2 \xrightarrow{\text{lime}} \text{Ca}(\text{OH})_2 \rightarrow 2\text{CaCO}_3 \text{ calcium}$ $\text{slaked}$ $\text{carbonate } + 2\text{H}_2\text{O}$ $\text{insoluble}$ $\text{By Boiling:}$ $\text{Soluble bicarbonates are converted into insoluble carbonates which are}$ $\text{removed by filtration}$ $\text{Reactions: }\text{Ca}(\text{HCO}_3)_2 \rightarrow \text{CaCO}_3\downarrow + \text{H}_2\text{O} + \text{CO}_2$ $\rightarrow \text{Mg}(\text{HCO}_3)_2 \rightarrow \text{MgCO}_3\downarrow + \text{H}_2\text{O} + \text{CO}_2$

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
}