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  4. On complete combustion, 0.492 g of an organic compound gave 0.792 g of CO 2. The % of carbon in the organic compound is (Nearest integer)

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Q. On complete combustion, $0.492\, g$ of an organic compound gave $0.792 \,g$ of $CO _2$. The $\%$ of carbon in the organic compound is ___ (Nearest integer)

JEE MainJEE Main 2023

Solution:

weight of $C$ in $0.792\, gm\, CO _2$
$=\frac{12}{44} \times 0.792=0.216$
$ \% $ of $ C$ in compound $=\frac{0.216}{0.492} \times 100 $
$ =43.90 \%$
$=44$