JEE Main 2023 · ChemistryNumerical answerNumerical valueEasyCalculation

JEE Main 13 April 2023, Shift 1, Chemistry Q88

Question 88 of 90 in this shift, Chemistry question 28 of 30, Section B.

An organic compound gives 0.220 g of

\mathrm{CO_2}

and 0.126 g of

\mathrm{H_2O}

on complete combustion. If the % of carbon is 24 then the % of hydrogen is __________

\times10^{-1}

. ( Nearest integer )

Official answer

NTA final key.

Chapter: Organic Chemistry: Some Basic Principles and Techniques
Topic: Stoichiometry
Idea tested: Empirical Formula from Combustion Data

Same idea in other shifts

Asked 8× in all

2 Apr 2025, Shift 1 · Q63On complete combustion 1.0 g of an organic compound (X) gave 1.46 g of $\mathrm{CO_2}$ and 0.567 g of $\mathrm{H_2O}$ . The empirical…MediumSingle correct
3 Apr 2025, Shift 1 · Q740.5 g of an organic compound on combustion gave 1.46 g of $\mathrm{CO_2}$ and 0.9 g of $\mathrm{H_2O}$ . The percentage of carbon in the…EasyNumerical value
8 Apr 2025, Shift 2 · Q62On combustion 0.210 g of an organic compound containing C, H and O gave 0.127 g $\mathrm{H_2O}$ and 0.307 g $\mathrm{CO_2}$ . The…MediumSingle correct
8 Apr 2023, Shift 1 · Q900.5 g of an organic compound (X) with 60% carbon will produce ______ $\times10^{-1}$ g of $\mathrm{CO_2}$ on complete combustion.EasyNumerical value
28 Jul 2022, Shift 1 · Q90On complete combustion of 0.492 g of an organic compound containing C, H and O, 0.7938 g of $\mathrm{CO_2}$ and 0.4428 g of…EasyNumerical value
26 Jun 2022, Shift 1 · Q88On complete combustion 0.30 g of an organic compound gave 0.20 g of carbon dioxide and 0.10 g of water. The percentage of carbon in the…EasyNumerical value
25 Feb 2021, Shift 1 · Q42Complete combustion of 1.80 g of an oxygen containing compound ( $\mathrm{C_xH_yO_z}$ ) gave 2.64 g of $\mathrm{CO_2}$ and 1.08 g of…EasySingle correct

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.