Import Question JSON

Current Question (ID: 21079)

Question:

$\text{Arrange the following solution in the decreasing order of pOH:}$ $\text{(A). 0.01 M HCl}$ $\text{(B). 0.01 M NaOH}$ $\text{(C). 0.01 M CH}_3\text{COONa}$ $\text{(D). 0.01 M NaCl}$

Options:

1. $(\text{B}) > (\text{C}) > (\text{D}) > (\text{A})$
2. $(\text{A}) > (\text{C}) > (\text{D}) > (\text{B})$
3. $(\text{B}) > (\text{D}) > (\text{C}) > (\text{A})$
4. $(\text{A}) > (\text{D}) > (\text{C}) > (\text{B})$

Solution:

$\text{Hint: pOH = 14 - pH and } -\log[\text{OH}^-]$ $\text{Calculate the pOH as follows:}$ $\text{(A). 0.01 M HCl}$ $\text{pOH} = 14 - \text{pH}$ $= 14 - ( - \log[\text{H}^+])$ $= 14 - ( - \log(0.01))$ $\text{pOH} = 14 - 2$ $= 12$ $\text{(B). 0.01 M NaOH}$ $\text{pOH} = -\log[\text{OH}^-]$ $= -\log(0.01)$ $= 2$ $\text{(C). 0.01 M CH}_3\text{COONa}$ $\text{CH}_3\text{COONa undergoes hydrolysis reaction and generates OH}^- \text{ ion.}$ $\text{The pOH value is less than 7.}$ $\text{(D). NaCl is a salt of strong acid and base. Its solution is neutral.}$ $\text{The pH of the solution is 7 and pOH is also 7.}$ $\text{The decreasing order of pOH is A > D > C > B}$

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
}