JEE Main 2022 · 28 Jul · Shift 1 · Chemistry Q90

← JEE Main 2022 · 28 Jul · Shift 1

ChemistryInteger+4 / -1Question 90 of 90

On 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 $\mathrm{H_2O}$ was produced. The % composition of oxygen in the compound is ______.

Your answer

Answer and worked solution

Official answer: 46

Carbon $0.7938\times\frac{12}{44}=0.2165$ g; hydrogen $0.4428\times\frac2{18}=0.0492$ g.

Oxygen $0.492-0.2657=0.2263$ g, which is 46%.

Answer: 46

Topics:Qualitative and quantitative analysis of organic compounds

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JEE Main 2022 · 28 Jul · Shift 1, Chemistry question 90