Import Question JSON

Current Question (ID: 18429)

Question:

$\text{Among the given options, which element is the minimum required for}$ $\text{precipitation of a negatively charged suspension of clay in water?}$

Options:

1. $\text{Aluminium chloride.}$
2. $\text{Potassium sulphate.}$
3. $\text{Sodium hydroxide.}$
4. $\text{Hydrochloric acid.}$

Solution:

$\text{(1) HINT: Follow Hardy - Schulze's Rule}$ $\text{Explanation:}$ $\text{Clay is negatively charged. So, negatively charged sols require minimum}$ $\text{amount of electrolyte having higher valence of cation.}$ $\text{As } \text{Al}^{3+} \text{ has high charge and small size, the coagulation power of } \text{AlCl}_3 \text{ will}$ $\text{be highest.}$ $\text{Thus, aluminium chloride will be required in minimum amount to coagulate}$ $\text{negatively charged suspension of clay in water.}$

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
}