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Current Question (ID: 9186)

Question:

$\text{The strongest base among the following is-}$

Options:

1. $\text{Al(OH)}_3$
2. $\text{Mg(OH)}_2$
3. $\text{Ca(OH)}_2$
4. $\text{Ba(OH)}_2$

Solution:

$\text{HINT: The basic nature of hydroxides increases from } \text{Be(OH)}_2 \text{ to } \text{Ba(OH)}_2\text{.}$$ $\text{Explanation:}$ $\text{As we move down the group, the size of the metal ion increases, so the bonding between the metal and hydroxide ion is weak.}$ $\text{Hence, they can easily lose } \text{OH}^- \text{ ion. So, down the group, the basicity of alkali metal oxides and hydroxides increases.}$ $\text{The basic nature of hydroxides increases from } \text{Be(OH)}_2 \text{ to } \text{Ba(OH)}_2\text{.}$ $\text{The hydroxide of Be is amphoteric. } \text{Al(OH)}_3 \text{ is also amphoteric.}$ $\text{Magnesium hydroxide is weakly basic in nature.}$

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
}