JEE Main Chemistry · Organic Chemistry: Some Basic Principles and Techniques

Empirical Formula from Combustion Data

Empirical Formula from Combustion Data (Organic Chemistry: Some Basic Principles and Techniques) was asked 4 times in 4 JEE Main shifts, 2022–2025, out of the 42 shifts Lumi analysed. 2 of the 4 had a numerical answer.

Times asked: 4; in 4 shifts
Years: 2022–2025
Usual format: Numerical value; Calculation
Pattern: Occasional; repeats across shifts

How it is asked

Percentages from combustion analysis
Empirical formula mass from combustion data

Difficulty

Easy 2Medium 2Hard 0

Where it sits

Chapter: Organic Chemistry: Some Basic Principles and Techniques. Topic: Stoichiometry, 38 questions over 16 ideas.

All 4 questions

Newest first, each with its options and official answer.

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
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