Question:
When 0.25 g of an organic compound is completely oxidised with excess oxygen, 0.22 g of \(CO_{2}\) is produced. What is the percentage of carbon in the compound?
When 0.25 g of an organic compound is completely oxidised with excess oxygen, 0.22 g of \(CO_{2}\) is produced. What is the percentage of carbon in the compound?
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In quantitative analysis, Carbon always comes from $CO_2$ and Hydrogen from $H_2O$.
Updated On: Apr 27, 2026
- 40%
- 24%
- 48%
- 30%
- 18%
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The Correct Option is B
Solution and Explanation
Step 1: Concept
$\%C = \frac{12}{44} \times \frac{\text{Mass of } CO_2}{\text{Mass of Compound}} \times 100$.
Step 2: Meaning
Calculate the fraction of carbon by weight in the total sample.
Step 3: Analysis
$\%C = \frac{12}{44} \times \frac{0.22}{0.25} \times 100 = \frac{12}{44} \times \frac{22}{25} \times 100 = \frac{12}{2} \times \frac{1}{25} \times 100 = 6 \times 4 = 24\%$.
Step 4: Conclusion
The percentage of carbon is 24%.
Final Answer: (B)
$\%C = \frac{12}{44} \times \frac{\text{Mass of } CO_2}{\text{Mass of Compound}} \times 100$.
Step 2: Meaning
Calculate the fraction of carbon by weight in the total sample.
Step 3: Analysis
$\%C = \frac{12}{44} \times \frac{0.22}{0.25} \times 100 = \frac{12}{44} \times \frac{22}{25} \times 100 = \frac{12}{2} \times \frac{1}{25} \times 100 = 6 \times 4 = 24\%$.
Step 4: Conclusion
The percentage of carbon is 24%.
Final Answer: (B)
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