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Chemistry · 2026

JEE Main · 2 April 2026, Shift 2 · Q62

Complete combustion of X g of an organic compound gave 0.25 g of CO_2 and 0.12 g of H_2 O. If the % of carbon is 25 % and of hydrogen is 4.89 %, then…

Complete combustion of X g of an organic compound gave $\displaystyle 0.25$ g of $\displaystyle \mathrm{CO}_2$ and $\displaystyle 0.12$ g of $\displaystyle \mathrm{H}_2 \mathrm{O}$. If the % of carbon is $\displaystyle 25$ % and of hydrogen is $\displaystyle 4.89 \%$, then $\displaystyle \mathrm{X}=$ $\displaystyle \_\_\_\_$ $\displaystyle \times 10^{-3} \mathrm{~g}$. (Nearest integer) (Molar mass of $\displaystyle \mathrm{C}, \mathrm{H}$ and O are $\displaystyle 12,1$ and $\displaystyle 16 \mathrm{~g} \mathrm{~mol}^{-1}$ respectively.)
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JEE Main 2026 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.