JEE MAIN - Chemistry (2022 - 28th June Morning Shift - No. 23)
In the estimation of bromine, 0.5 g of an organic compound gave 0.40 g of silver bromide. The percentage of bromine in the given compound is _________ % (nearest integer)
(Relative atomic masses of Ag and Br are 108u and 80u, respectively).
Answer
34
Explanation
$188 \mathrm{~g} ~ \mathrm{AgBr}$ has $80 \mathrm{~g}$ of $\mathrm{Br}$
$$ \therefore 0.4 \mathrm{~g} \mathrm{AgBr}=\frac{80}{188} \times 0.4 $$
$\%$ of $\mathrm{Br}$ in given organic compound
$$ \begin{aligned} &=\frac{80 \times 0.4}{188 \times 0.5} \times 100 \\\\ &\approx 34 \% \end{aligned} $$
$$ \therefore 0.4 \mathrm{~g} \mathrm{AgBr}=\frac{80}{188} \times 0.4 $$
$\%$ of $\mathrm{Br}$ in given organic compound
$$ \begin{aligned} &=\frac{80 \times 0.4}{188 \times 0.5} \times 100 \\\\ &\approx 34 \% \end{aligned} $$
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