Import Question JSON

Current Question (ID: 21192)

Question:
$\text{Among the following, how many metal ions act as oxidising agents?}$ $\text{Sn}^{2+}, \text{Sn}^{4+}, \text{Pb}^{4+}, \text{Pb}^{2+}, \text{Tl}^{+}, \text{Tl}^{3+}$
Options:
  • 1. $2$
  • 2. $4$
  • 3. $1$
  • 4. $0$
Solution:
$\text{Hint: Due to inert pair effect, } \text{Pb}^{2+} \text{ is more stable than } \text{Pb}^{4+} \text{ and } \text{Tl}^{+} \text{ is more stable than } \text{Tl}^{3+}.$ $\text{Due to inert pair effect, } \text{Pb}^{2+} \text{ is more stable than } \text{Pb}^{4+} \text{ and } \text{Tl}^{+} \text{ is more stable than } \text{Tl}^{3+}. \text{ Therefore, } \text{Pb}^{4+} \text{ and } \text{Tl}^{3+} \text{ only will act as oxidising agents.}$ $\bullet \ \text{Sn}^{2+}: \text{This is a relatively stable oxidation state of tin. It can act as a reducing agent, but it is not typically an oxidizing agent because it is more likely to lose electrons to form } \text{Sn}^{4+}.$ $\bullet \ \text{Sn}^{4+}: \text{This is the more stable oxidation state for tin, so } \text{Sn}^{4+} \text{ is unlikely to gain electrons further and therefore does not act as an oxidizing agent.}$ $\bullet \ \text{Pb}^{4+}: \text{Lead(IV) is relatively unstable and tends to reduce to } \text{Pb}^{2+}, \text{ so it can act as an oxidizing agent by accepting electrons.}$ $\bullet \ \text{Pb}^{2+}: \text{This is a stable oxidation state for lead, so it generally does not act as an oxidizing agent.}$ $\bullet \ \text{Tl}^{+}: \text{Thallium(I) is the more stable oxidation state of thallium, so it is unlikely to act as an oxidizing agent.}$ $\bullet \ \text{Tl}^{3+}: \text{Thallium(III) is relatively unstable and tends to reduce to } \text{Tl}^{+}, \text{ making it an oxidizing agent.}$

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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
}