Import Question JSON

Current Question (ID: 20819)

Question:
$\text{Which of the following statements is incorrect?}$
Options:
  • 1. $\text{In a homogeneous mixture, the composition is uniform.}$
  • 2. $\text{Compounds are formed when atoms of different elements combine together in any ratio.}$
  • 3. $\text{Atoms of the same element have identical atomic mass and properties.}$
  • 4. $\text{In a heterogeneous mixture, the composition is not uniform.}$
Solution:
$\text{(1) In a homogeneous mixture, the components are so thoroughly mixed that you can't visually distinguish them. They are evenly distributed, like salt dissolved in water, where the salt is not visible and the solution appears clear. In a homogeneous mixture, the composition is uniform. Thus, it is a correct statement.}$ $\text{(2) Compounds are formed when atoms of different elements combine together in a fixed ratio. This fixed ratio means that the compound will always have the same proportions of those elements, regardless of its amount. Hence, the 2nd statement is incorrect.}$ $\text{(3) John Dalton postulates that atoms of a specific element are identical in size, mass, and other properties. However, atoms of different elements exhibit different properties and vary in shape and size. This is a correct statement.}$ $\text{(4) The components of a heterogeneous mixture are not evenly distributed, and different parts of the mixture may have different compositions. Hence, it is a correct statement.}$ $\text{Hence, option 2 is the correct answer.}$

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
}