An organic compound gives 0.220 g of C O 2 and 0.126 g of H 2 O on complete combustion. If the % of carbon is 24 then the % of hydrogen is ______ × 10 - 1 . (Nearest integer). [2023]

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Solution

Q.
An organic compound gives 0.220 g of $C O_{2}$ and 0.126 g of $H_{2} O$ on complete combustion. If the % of carbon is 24 then the % of hydrogen is ______ $\times 10^{- 1}$ . (Nearest integer). [2023]

Ans.
(56)

$Moles of C O_{2} = \frac{0.220}{44} = 0.005 ⟶ Moles of C = 0.005$

$Moles of H_{2} O = \frac{0.126}{18} = 0.007 ⟶ Moles of H = 0.014$

$Wt. of C = 0.005 \times 12 = 0.06$ $\frac{m C}{m H} = \frac{0.06}{0.014} = \frac{24}{x %}$

$x % = 5.6 % = 56 \times 10^{- 1}$

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