Import Question JSON

Current Question (ID: 18803)

Question:

$\text{Match the following characteristics to the appropriate metal:}$ $\begin{array}{|c|c|} \hline \text{Column I - Aspects} & \text{Column II - Metal} \\ \hline \text{(a) The metal which reveals the maximum number of oxidation states} & \text{(i) Scandium} \\ \text{(b) The metal although placed in 3d block is considered not as a transition element} & \text{(ii) Copper} \\ \text{(c) The metal which does not exhibit variable oxidation states} & \text{(iii) Manganese} \\ \text{(d) The metal which in +1 oxidation state in aqueous solution undergoes disproportionation} & \text{(iv) Zinc} \\ \hline \end{array}$ $\text{Select the correct option:}$

Options:

1. $(i)\ (iv)\ (ii)\ (iii)$
2. $(iii)\ (iv)\ (i)\ (ii)$
3. $(iii)\ (i)\ (iv)\ (ii)$
4. $(ii)\ (iv)\ (i)\ (iii)$

Solution:

$\text{1. The electronic configuration of Mn is [Ar]3d}^5 \text{4s}^2.\ \text{So, it can show oxidation state from +2 to +7.}$ $\text{2. Zinc is not considered a transition element because it does not have partly filled (or incomplete) d-subshell. It has 3d-subshell full filled.}$ $\text{3. Scandium (Z = 21) of 3d series does not exhibit variable oxidation states.}$ $\text{It's electronic configuration is [Ar]3d}^1 \text{4s}^2.\ \text{Thus, it shows only +3 oxidation state.}$ $\text{4. Cu}^{+1} : \text{This is because although energy is required to remove one electron from Cu}^{+} \text{to Cu}^{2+}, \text{high hydration energy of Cu}^{2+} \text{compensates for it.}$ $\text{Therefore, Cu}^{+} \text{ion in an aqueous solution is unstable.}$ $\text{It disproportionates to give Cu}^{2+} \text{and Cu.}$ $2\ \text{Cu}^{+} \rightarrow \text{Cu}^{2+} + \text{Cu}$

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
}