Import Question JSON

Current Question (ID: 18532)

Question:

$\text{Which of the following metals can be purified by electrolytic refining?}$

Options:

1. $\text{Cu, and Zn}$
2. $\text{Ge, and Si}$
3. $\text{Zr, and Ti}$
4. $\text{Zn, and Hg}$

Solution:

$\text{HINT: Cu and Zn are purified by electrolytic refining.}$ $\text{Explanation:}$ $\text{STEP 1:}$ $\text{Electrolytic refining is the process of refining a metal (mainly copper) by the process of electrolysis.}$ $\text{The clean or pure metal is formed at the cathode when the electrical current of a sufficient voltage is applied}$ $\text{by dissolving impure metal at the anode.}$ $\text{Copper and zinc are two metals that are generally purified by using electrolyte refining.}$ $\text{In this process, impure metal is used as an anode and pure metal is used as a cathode.}$ $\text{STEP 2:}$ $\text{Impurities from the blister copper or impure zinc deposit as anode mud.}$ $\text{The reactions involved are:}$ $\text{At anode: Cu(Impure) } \rightarrow \text{ Cu}^{2+} + 2\text{e}^- $ $\text{At cathode: Cu}^{2+} \rightarrow \text{ Cu(Pure) + 2e}^- $

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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
}