Import Question JSON

Current Question (ID: 15772)

Question:

In England before industrialisation set in, it was observed that there were more white winged moths on trees than dark-winged or melanised moths. After industrialisation, there was more dark winged moths in the same area. The explanation put forth for this observation is a. White winged moths changed into melanised form in polluted environment due to deposition of soot b. The tree trunks became dark due to industrial smoke and soots. Under this condition the white winged moth did not survive due to predator c. Dark winged or melanised moth survived as they could hide in the background d. Black winged moth are recessive mutants of the same gene How many of the above statements are correct?

Options:

1. One
2. Two
3. Three
4. Four

Solution:

The correct explanation is that the tree trunks became dark due to industrial smoke and soots, which allowed dark winged moths to survive as they could hide in the background. White winged moths did not survive due to predation.

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
}