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  4. An organic compound weighing 0.15 g gave on Carius estimation, 0.12 g of AgBr. The percentage of Br in the compound will be close to (At. mass of Ag = 108, Br = 80)

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Q. An organic compound weighing $0.15\, g$ gave on Carius estimation, $0.12\, g$ of $AgBr$. The percentage of Br in the compound will be close to (At. mass of $Ag = 108, Br = 80$)

COMEDKCOMEDK 2015Organic Chemistry – Some Basic Principles and Techniques

Solution:

Percentage of bromine in the compound
$ = \frac{80}{188} \times \frac{\text{Mass of AgBr formed}}{\text{Mass of substance taken}} \times 100$
$ = \frac{80}{188} \times \frac{0.12}{0.15} \times 100 = 34.04\%$