Import Question JSON

Current Question (ID: 21238)

Question:

$\text{In chromatography, which of the following statements is incorrect for } R_f?$ $1. \ R_f \ \text{value depends on the type of chromatography.}$ $2. \ \text{Higher } R_f \ \text{value means higher adsorption.}$ $3. \ R_f \ \text{value is dependent on the mobile phase.}$ $4. \ \text{The value of } R_f \ \text{can never be more than one.}$

Options:

1. $R_f \ \text{value depends on the type of chromatography.}$
2. $\text{Higher } R_f \ \text{value means higher adsorption.}$
3. $R_f \ \text{value is dependent on the mobile phase.}$
4. $\text{The value of } R_f \ \text{can never be more than one.}$

Solution:

$\text{Hint: Higher } R_f \ \text{value means lower adsorption}$ $R_f \ \text{value depends on the type of chromatography. It is a correct statement.}$ $R_f \ \text{value is dependent on the mobile phase. It is a correct statement.}$ $\text{The } R_f \ \text{value cannot be more than one. It is a correct statement.}$ $\text{Higher } R_f \ \text{value means lower adsorption or vice versa hence, option second is the correct answer.}$

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
}