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  4. 0.25 g of an organic compound containing chlorine gave 0.40 g of silver chloride in Carius estimation. The percentage of chlorine present in the compound is [in nearest integer] (Given: Molar mass of Ag is 108 g mol -1 and that of Cl is 35.5 g mol -1 )

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Q. $0.25\, g$ of an organic compound containing chlorine gave $0.40 \,g$ of silver chloride in Carius estimation. The percentage of chlorine present in the compound is ____[in nearest integer]
(Given: Molar mass of $Ag$ is $108\, g\, mol ^{-1}$ and that of $Cl$ is $35.5 \,g \,mol ^{-1}$ )

JEE MainJEE Main 2022Organic Chemistry – Some Basic Principles and Techniques

Solution:

wt. of organic compound $=0.25\, g$
mass of $Cl =\frac{35.5}{143.5} \times 0.4 \,g$
mass $\%$ of $Cl$ in the organic compound
$=\frac{35.5 \times 0.4}{143.5 \times 0.25} \times 100 $
$=39.58 \%$