JEE Main 2025 — Some Basic Concepts Of Chemistry Question with Solution

To determine the percentage of carbon in the organic compound, follow these steps:

Calculate Moles of CO₂:

Given: 1.46 g of CO₂ is produced.

Molar mass of CO₂ = 44 g/mol.

Moles of CO₂ = $\frac{1.46\text{ g}}{44\text{ g/mol}}$.

Determine Moles of Carbon Atoms:

Each molecule of CO₂ contains one atom of carbon.

Thus, moles of carbon = moles of CO₂.

Calculate Mass of Carbon:

Molar mass of carbon (C) = 12 g/mol.

Mass of carbon = Moles of carbon × 12 g/mol.

Mass of carbon = $\frac{1.46}{44}\times 12$.

Calculate Percentage of Carbon:

Total mass of the organic compound = 0.5 g.

Percentage of carbon = $\left(\frac{\text{Mass of carbon}}{0.5\text{ g}}\right)\times 100\%$.

Hence, Percentage of carbon = $\frac{1.46}{44}\times \frac{12}{0.5}\times 100$.

Percentage of carbon = 79.63%.

Therefore, the percentage of carbon in the compound is approximately 80%.