Import Question JSON

Current Question (ID: 7833)

Question:

$\text{The basic difference between Mendeleev's Periodic Law (A) and Modern Periodic Law (B) is:}$

Options:

1. $\text{A is based on atomic weights while B is based on atomic numbers.}$ (Correct)
2. $\text{B is based on atomic weights while A is based on atomic numbers.}$
3. $\text{A is based on the number of isotopes while B is based on atomic numbers.}$
4. $\text{A is based on physical properties while B is based on chemical properties.}$

Solution:

$\text{HINT: Atomic weight was considered a fundamental property till Mosely's experiment.}$ $\text{Explanation:}$ $\text{Mendeleev's Periodic Law states that the physical and chemical properties of elements are periodic functions of their atomic weights.}$ $\text{On the other hand, the Modern Periodic Law states that the physical and chemical properties of elements are periodic functions of their atomic numbers.}$

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
}