Import Question JSON

Current Question (ID: 18702)

Question:

$\text{Which of the following statements about ammonium cerium (IV) nitrate, } (\text{NH}_4)_2[\text{Ce} (\text{NO}_3)_6] \text{ is incorrect?}$

Options:

1. $\text{NO}_3^- \text{ acts as a monodentate ligand.}$
2. $\text{The Ce atom has a coordination number of 12.}$
3. $\text{The shape of the complex ion is an icosahedron.}$
4. $\text{The solution is used as an oxidizing agent.}$

Solution:

$\text{Homoleptic metal nitrate complexes generally have O,O'-bidentate nitrate ligands.}$ $\text{HINT: Coordination number of Ce is 12.}$ $\text{Explanation:}$ $\text{STEP 1: } (\text{NH}_4)_2[\text{Ce} (\text{NO}_3)_6] \rightarrow 2\text{NH}_4^+ \left[\text{Ce} (\text{NO}_3)_6\right]^{-2}$ $\text{Oxidation number of Ce is +4}$ $\text{STEP 2: } \text{NO}_3^- \text{ acts as a bidentate ligand here.}$ $\text{The structure of complex is:}$ $\text{STEP 3: This orange-red, water-soluble cerium salt is a specialised oxidizing agent in organic synthesis and a standard oxidant in quantitative analysis.}$ $\text{So, statement (1) is incorrect.}$

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
}