Import Question JSON

Current Question (ID: 18048)

Question:

$\text{A drinking water sample was found to be contaminated with chloroform at a level of } 15 \text{ ppm (by mass). What is the mass percent of chloroform in the sample?}$

Options:

1. $15 \times 10^{-4}$
2. $1.5 \times 10^{-4}$
3. $0.15 \times 10^{-4}$
4. $15 \times 10^{-5}$

Solution:

$\text{Hint: Mass percent} = \frac{\text{amount of chloroform}}{\text{amount of solution}} \times 100$ $\text{Step 1:}$ $\text{The amount of chloroform is 15 ppm. It indicates that 15 g of chloroform is present in } 10^6 \text{ g of solvent.}$ $\text{The formula of mass percent is as follows:}$ $\text{Mass percent} = \frac{\text{amount of chloroform}}{\text{amount of solution}} \times 100$ $\text{Step 2:}$ $\text{Calculate the mass percent of chloroform is as follows:}$ $\text{Mass percent} = \frac{15}{15} \text{ g}15 + 10^6 \text{ g} \times 100$ $\text{Mass percent} = \frac{15}{15} \text{ g}10^6 \text{ g} \times 100$ $\text{Mass percent} = 15 \times 10^{-4} \%$

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
}