JEE MAIN - Chemistry (2022 - 27th June Evening Shift - No. 22)
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)
Answer
40
Explanation
Given, weight of organic compound = 0.25 g
Moles of AgCl = $${{0.4} \over M}$$
Molecular mass of AgCl (M) = 143.5 gm
$$\therefore$$ Moles of AgCl = $${{0.4} \over 143.5}$$
$$\therefore$$ Mass of Cl = $${{0.4} \over 143.5}$$ $$\times$$ 35.5
Mass % of Cl in the organic compound
$$ = {{{{35.5 \times 0.4} \over {143.5}}} \over {0.25}} \times 35.5$$
$$ = 39.58$$
$$ \simeq 40$$
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