JKSSB Mock Tests

0.25 g of an organic compound gave 0.20 gof CO2 after complete combustion. The percentage composition of carbon is .

A. 80.00%
B. 78.18%
C. 21.82%
D. 4.60%
Answer: Option C
Solution (By JKSSB Mock Tests Team)
Using Liebig's method for elemental analysis, the carbon in the sample is entirely converted to CO2. Since carbon makes up 12/44 of the mass of CO2, the absolute carbon content in the original 0.25 g sample mathematically calculates to 21.82%.
This Question Belongs to: General science Chemistry set 1
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