Question

On complete combustion, 0.500 g of an organic compound gave 0.150 of carbon dioxide. Determine the percentage composition of carbon in the compound.

(a) 8.18%

(b) 81.8%

(c) 0.81%

(d) 81%

This question was addressed to me in a national level competition.

I want to ask this question from Organic Chemistry in division Organic Chemistry – Basic Principles and Technique of Chemistry – Class 11

Answer 1

The correct option is (a) 8.18%

Explanation: The required equation is:

Percentage of carbon = 12 * m2 * 100/ 44 * m

In this case, m = 0.500

 m2 = 0.150

Substituting in the equation → Percentage of carbon = 12 * 0.150 * 100/ 44 * 0.500

 = 8.18%

Therefore, the percentage of carbon present in the organic compound is 8.18%.