JEE Main 2022 · 24 Jun · Shift 2 · Chemistry Q61

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ChemistrySingle correct+4 / -1Question 61 of 90

120 g of an organic compound that contains only carbon and hydrogen gives 330 g of $\mathrm{CO_2}$ and 270 g of water on complete combustion. The percentage of carbon and hydrogen, respectively are

25 and 75

40 and 60

60 and 40

75 and 25

Answer and worked solution

Official answer: D

Carbon. $330\times\dfrac{12}{44}=90$ g, i.e. $\dfrac{90}{120}=75\%$ .

Hydrogen. $270\times\dfrac2{18}=30$ g, i.e. $25\%$ .

(D)

Topics:Empirical and molecular formula Qualitative and quantitative analysis of organic compounds

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JEE Main 2022 · 24 Jun · Shift 2, Chemistry question 61