Import Question JSON

Current Question (ID: 21147)

Question:

$\text{An aqueous solution of 1M NaCl and 1M HCl is:}$

Options:

1. $\text{not a buffer but pH} < 7$
2. $\text{not a buffer but pH} > 7$
3. $\text{a buffer with pH} < 7$
4. $\text{a buffer with pH} > 7$

Solution:

$\text{Hint: Salt of strong acid and strong base did not form a buffer with strong acid.}$ $\text{NaCl is a salt of strong acid and a strong base. It's not the case of a buffer.}$ $\text{NaCl} + \text{H}_2\text{O} \rightarrow \text{NaOH} + \text{HCl}$ $\text{aqueous NaCl, itself exact neutral solution}$ $\text{HCl} + \text{H}_2\text{O} \rightarrow \text{H}_3\text{O}^+ + \text{Cl}^-$ $\text{makes the solution acidic.}$ $\text{Hence, the HCl solution is acidic and pH is less than 7. The solution is not buffer.}$

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
}