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JEE Main20257 Apr 2025Morning ShiftChemistrySome Basic Concepts of ChemistryActual

An organic compound weighing 500 mg , produced 220 mg of CO ₂ . on complete combustion. The percentage composition of carbon in the compound is _____ %. (nearest integer) (Given molar mass in g mol ⁻¹ of C : 12, O : 16 )

Correct answer

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Step-by-step solution

Organic compound [ ] CuO CO ₂+ H ₂ O aligned & n _ CO ₂ = 220 10⁻³ 44 =5 10⁻³ moles & m _ C =5 10⁻³ 12 aligned % ~m carbon = 5 10⁻³ 12 500 10⁻³ 100=12 % Correct answer is 12

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