JEE Main 2021 — Some Basic Concepts Of Chemistry Question with Solution
From: JEE Main 2021 (Online) 25th February Morning Shift
Question
Complete combustion of 1.80 g of an oxygen containing compound (CxHyOz) gave 2.64 g of CO2 and 1.08 g of H2O. The percentage of oxygen in the organic compound is :
Choose an option
Show full solutionCorrect option: D
Correct answer
D53.33
Step-by-step explanation
CxHyOz + O2 xCO2 +
2.64 g of CO2 contains 0.72 g C.
1.08 g of H2O contains 0.12 g H.
Mass of oxygen present = 1.80 – (0.72 +0.12) = 0.96 g
% of O = = 53.33 %
2.64 g of CO2 contains 0.72 g C.
1.08 g of H2O contains 0.12 g H.
Mass of oxygen present = 1.80 – (0.72 +0.12) = 0.96 g
% of O = = 53.33 %
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This is a previous-year question from JEE Main 2021, covering the Some Basic Concepts Of Chemistry chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.