JEE Main 2022 — Some Basic Concepts of Chemistry Question with Solution

Weight of the organic compound, W=120g,

Weight of carbondioxide $\left(\mathrm{x}\right)$=330g

Weight of water $\left(\mathrm{y}\right)$=270g

$$\begin{gathered} \mathrm{Percentage} \mathrm{of} \mathrm{carbon}=\frac{12}{44}\mathrm{X}\frac{\mathrm{x}}{\mathrm{W}}\mathrm{X}100 \\ =\frac{12}{44}\mathrm{X}\frac{330}{120}\mathrm{X}100 \\ =75\% \\ \mathrm{Percentage} \mathrm{of} \mathrm{Hydrogen} =\frac{2}{18}\mathrm{X}\frac{\mathrm{y}}{\mathrm{W}}\mathrm{X}100 \\ =\frac{2}{18}\mathrm{X}\frac{270}{120}\mathrm{X}100 \\ =25\% \end{gathered}$$